Reprint Server: Canonical plugin configuration with legacy migration.

[atanas-dev]

Namespace and match the latest terminology in the plugin configuration, making sure old values are still read for backwards compatibility.

[github-actions]

Pull pipeline performance — large-directory

Site: large-directory · 2,000+ plus targeted file-transfer scenarios files · 10,000 posts · 25,000 postmeta · PHP 8.5.10

Stage	PR	trunk	Δ	Status	Details
playground-sqlite-db-pull	2.88 s	2.77 s	⚪ +101 ms (+3.7%)	✓	condition=db-pull in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=lexer native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=selected trunk: condition=db-pull in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=lexer native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=selected
playground-sqlite-db-apply	22.71 s	23.02 s	⚪ -313 ms (-1.4%)	✓	condition=db-apply to SQLite in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=parser native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=verified native_ast=WP_MySQL_Native_Parser_Node sqlite_driver_parser=verified trunk: condition=db-apply to SQLite in PHP.wasm runtime=php.wasm 8.3 wp_mysql_parser=enabled mode=parser native_lexer=verified native_token_stream=WP_MySQL_Native_Token_Stream native_token_count=18 native_parser=verified native_ast=WP_MySQL_Native_Parser_Node sqlite_driver_parser=verified
Total	25.59 s	25.80 s	⚪ -212 ms (-0.8%)

_{Numbers carry runner noise; treat single-run deltas as directional, not authoritative.}

_{📈 Trunk performance history — commit-by-commit timeline.}

[adamziel]

A changelog entry would help the consumers of this code migrate. CC @WPprodigy @fredrikekelund for visibility for the next time this code is updated in Jetpack.

[adamziel]

I have the same BC note here as in the previous PR in this stack. If we can avoid accumulating complexity, that's brilliant. If that will be too much of an inconvenience in Jetpack/wpcomsh/another consumer, then let's keep it. Any thoughts @fredrikekelund?