v3.18.8

Changelog

• e49e0ec chore: bump version to v3.18.8 [skip-release]
• cb9cbea docs(mcp): trim implementation noise from @through(column:) description
• 1381e84 feat(discovery): surface FK ambiguity + analytics-mode rules across MCP
• 1c3bb73 feat(mcp): aggregation usage hint references patterns + Limitations field (P4)
• 9af928e feat(mcp): dialect-aware exec-error augment with schema cross-check (P0)
• e389080 feat(mcp): per-table temporal-filter warning + comment cleanup (P8)
• b34da90 feat(mcp): pk_alias_mismatch arm + placeholder column names in patterns
• dd84981 feat(mcp): structured repair output for fix_query_error (Stage 5 + P1)
• 40fe7c2 feat(mcp): three universal query patterns surfaced in workflow + syntax (P3)
• de1722e feat(mcp): validate find_path example_query against compiler (P2)
• 953e5e4 fix(qcode): reject nested join through column dropped by distinct GROUP BY
• ddf2934 test(cmd): enforce MCP/CLI parity as a hard rule
• 7eac900 test(p5): verify composite-FK @through(column:) emits full join condition
• f60c912 test(stage3): failing repro for distinct+aggregate+nested-join bug