Add new version of pgmanager

[djthorpe]

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[Copilot]

Pull request overview

This PR introduces a new PostgreSQL management implementation (pgmanager/), expands the (currently ignored-by-Go) next-generation manager implementation under pkg/_manager/, updates the cmd/pgmanager entrypoint to use the go-server command framework, and adds HTTP error mapping to the core pg package.

Changes:

• Add a new pgmanager/ module (manager, HTTP handlers, HTTP client, and CLI commands) including health, database, and connection operations plus OTEL metrics/spans.
• Add new manager/schema/httpclient/httphandler code under pkg/_manager/ (in an underscore-prefixed folder).
• Add pg.HTTPError mapping, and bump several dependencies in go.mod.

Reviewed changes

Copilot reviewed 25 out of 122 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
pkg/test/main.go	Removes (comments out) manager test helper code and associated import.
pkg/_manager/tablespace.go	Adds tablespace CRUD logic (in underscore-prefixed directory).
pkg/_manager/statement.go	Adds pg_stat_statements listing/reset API (underscore-prefixed directory).
pkg/_manager/statement_test.go	Adds integration tests for statement stats (underscore-prefixed directory).
pkg/_manager/setting.go	Adds server settings list/get/update/reload methods (underscore-prefixed directory).
pkg/_manager/schema/statement.go	Adds statement schema types + SQL builder for pg_stat_statements (underscore-prefixed directory).
pkg/_manager/schema/setting.go	Adds settings schema types + SQL for pg_settings and ALTER SYSTEM (underscore-prefixed directory).
pkg/_manager/schema/setting_test.go	Adds unit tests for settings SQL selection and stringify (underscore-prefixed directory).
pkg/_manager/schema/globals.go	Adds shared constants and extension bootstrap helpers (underscore-prefixed directory).
pkg/_manager/schema/doc.go	Adds package documentation for manager schema (underscore-prefixed directory).
pkg/_manager/schema/connection.go	Adds connection schema + SQL for pg_stat_activity (underscore-prefixed directory).
pkg/_manager/schema/connection_test.go	Adds unit tests for connection schema selection logic (underscore-prefixed directory).
pkg/_manager/role.go	Adds role CRUD/update logic (underscore-prefixed directory).
pkg/_manager/replicationslot.go	Adds replication slot CRUD logic (underscore-prefixed directory).
pkg/_manager/README.md	Adds documentation for the manager package architecture and usage (underscore-prefixed directory).
pkg/_manager/object.go	Adds cross-database object listing/get logic (underscore-prefixed directory).
pkg/_manager/object_test.go	Adds integration tests for object list/get (underscore-prefixed directory).
pkg/_manager/manager.go	Adds manager constructor/bootstrap and internal iterators (underscore-prefixed directory).
pkg/_manager/httphandler/tablespace.go	Adds REST handlers for tablespace endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/statement.go	Adds REST handlers for statement stats endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/setting.go	Adds REST handlers for server setting endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/schema.go	Adds REST handlers for schema endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/role.go	Adds REST handlers for role endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/replicationslot.go	Adds REST handlers for replication slot endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/object.go	Adds REST handlers for object listing/get endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/httphandler.go	Adds handler registration and pg→HTTP error mapping (underscore-prefixed directory).
pkg/_manager/httphandler/frontend_included.go	Adds embedded-frontend serving behind frontend build tag (underscore-prefixed directory).
pkg/_manager/httphandler/frontend_excluded.go	Adds fallback frontend handler when frontend tag is off (underscore-prefixed directory).
pkg/_manager/httphandler/extension.go	Adds REST handlers for extension endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/doc.go	Adds package documentation for manager HTTP handlers (underscore-prefixed directory).
pkg/_manager/httphandler/database.go	Adds REST handlers for database endpoints (underscore-prefixed directory).
pkg/_manager/httphandler/connection.go	Adds REST handlers for connection endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/tablespace.go	Adds typed HTTP client for tablespace endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/statement.go	Adds typed HTTP client for statement endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/setting.go	Adds typed HTTP client for setting endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/schema.go	Adds typed HTTP client for schema endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/role.go	Adds typed HTTP client for role endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/replicationslot.go	Adds typed HTTP client for replication slot endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/opts.go	Adds query option helpers for typed HTTP clients (underscore-prefixed directory).
pkg/_manager/httpclient/object.go	Adds typed HTTP client for object endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/extension.go	Adds typed HTTP client for extension endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/doc.go	Adds package docs for manager HTTP client (underscore-prefixed directory).
pkg/_manager/httpclient/database.go	Adds typed HTTP client for database endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/connection.go	Adds typed HTTP client for connection endpoints (underscore-prefixed directory).
pkg/_manager/httpclient/client.go	Adds constructor wrapper for the HTTP client (underscore-prefixed directory).
pkg/_manager/extension.go	Adds extension list/get/create/update/delete logic (underscore-prefixed directory).
pkg/_manager/doc.go	Adds package documentation for manager APIs (underscore-prefixed directory).
pkg/_manager/connection.go	Adds connection list/get/delete logic (underscore-prefixed directory).
pkg/_manager/connection_test.go	Adds integration tests for connection APIs (underscore-prefixed directory).
pgmanager/schema/globals.go	Adds pgmanager schema globals/constants.
pgmanager/schema/connection.go	Adds pgmanager connection types, SQL selection, and client query helpers.
pgmanager/schema/cluster.go	Adds schema and SQL to retrieve cluster name.
pgmanager/manager/status.go	Adds manager Ping with OTEL span.
pgmanager/manager/opt.go	Adds options for tracer/meter/cluster naming.
pgmanager/manager/metrics.go	Adds OTEL gauge registration for database size and connection counts.
pgmanager/manager/manager.go	Adds pgmanager constructor, cluster lookup, and metric registration.
pgmanager/manager/connection.go	Adds list/get/delete connection methods with spans and pagination clamp.
pgmanager/httphandlers/status.go	Adds health handler registration and Ping endpoint.
pgmanager/httphandlers/database.go	Adds OpenAPI-described database handlers.
pgmanager/httphandlers/connection.go	Adds OpenAPI-described connection handlers.
pgmanager/httpclient/status.go	Adds HTTP client Ping.
pgmanager/httpclient/database.go	Adds HTTP client database CRUD.
pgmanager/httpclient/connection.go	Adds HTTP client connection list/get/delete.
pgmanager/httpclient/client.go	Adds pgmanager HTTP client constructor.
pgmanager/cmd/server.go	Adds server command to run the pgmanager API server.
pgmanager/cmd/client.go	Adds client commands for ping/databases/connections.
go.mod	Updates Go/module dependencies (pgx, go-server, otel, x/sync, etc.).
error.go	Adds HTTP error mapping and SQLSTATE handling updates to core pg errors.
cmd/pgmanager/main.go	Switches pgmanager CLI to go-server/pkg/cmd entrypoint and wiring.
cmd/_pgmanager2/version.go	Adds legacy/alternate CLI version command (underscore-prefixed directory).
cmd/_pgmanager2/tablespace.go	Adds legacy/alternate CLI tablespace commands (underscore-prefixed directory).
cmd/_pgmanager2/statement.go	Adds legacy/alternate CLI statement commands (underscore-prefixed directory).
cmd/_pgmanager2/setting.go	Adds legacy/alternate CLI setting commands (underscore-prefixed directory).
cmd/_pgmanager2/server.go	Adds legacy/alternate CLI server command (underscore-prefixed directory).
cmd/_pgmanager2/schema.go	Adds legacy/alternate CLI schema commands (underscore-prefixed directory).
cmd/_pgmanager2/replicationslot.go	Adds legacy/alternate CLI replication slot commands (underscore-prefixed directory).
cmd/_pgmanager2/object.go	Adds legacy/alternate CLI object commands (underscore-prefixed directory).
cmd/_pgmanager2/main.go	Adds legacy/alternate CLI entrypoint (underscore-prefixed directory).
cmd/_pgmanager2/extension.go	Adds legacy/alternate CLI extension commands (underscore-prefixed directory).
cmd/_pgmanager2/database.go	Adds legacy/alternate CLI database commands (underscore-prefixed directory).
cmd/_pgmanager2/connection.go	Adds legacy/alternate CLI connection commands (underscore-prefixed directory).

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