v0.1.6

Observability

• Langfuse spans for surfacing tools — stm_surfacing_feedback, stm_surfacing_stats, and surfacing_feedback_boost are now wrapped in Langfuse observations
• End-to-end trace context propagation — proxy forwards _trace_id through the full pipeline: call_tool → upstream MCP, and SurfacingEngine → mcp_adapter.search()/scratch_list()

Internal

• Strategy-based parser for Phase 2 — _parse_results refactored into CompactResultParser / StructuredResultParser strategy classes; SurfacingConfig.result_format field added
• Extract tool_metadata and memory_ops from manager.py — manager.py reduced from 1,333 → 1,179 LOC
• Fix all ruff warnings — 16 pre-existing lint issues in tests/ cleaned up

Testing

• 1033 automated tests (up from 975), +1 xfail for Phase 2 structured format
• New test_proxy_manager_lifecycle.py, test_proxy_manager_pipeline.py, test_server_tools.py

Docs

• New notebook 05 — Observability and Langfuse Tracing
• Updated operations.md span table and notebook count in README (4 → 6)