[panviktor]

Summary

Implements the current Phase 4.10 context/routing hardening stack: provider-facing context pressure accounting, lane-aware model routing, strict shared runtime tool protocol cleanup, model profile catalog support, modality admission, bounded repair traces, and memory-quality guardrails. It also adds catalog-backed OpenRouter Gemma aliases (gemma31b, gemma26b) while keeping the default route unchanged.

Validation

• cargo fmt --all -- --check
• python3 -m json.tool crates/domain/data/model_catalog.json >/dev/null
• cargo test -q -p synapse_domain model_catalog --lib
• cargo test -q -p synapse_domain inbound_message_service::tests::effect_switch_model --lib
• cargo test -q -p synapse_adapters models_help_includes_configured_routes --lib
• cargo check -q -p synapse_domain -p synapse_adapters -p synapseclaw --features channel-matrix
• cargo build --release --features channel-matrix
• local user-service deploy plus health checks on ports 42617..42622
• gateway smoke for /model gemma31b resolving to google/gemma-4-31b-it via OpenRouter

Notes

The branch contains the five local commits currently ahead of origin/main and has been verified against the local working tree. GitHub reported existing default-branch Dependabot alerts during push; those are unrelated to this PR.