fix: prevent quote period score overflow

[vycdev2]

Summary

• widen quote-of-the-period score aggregation before summing so large totals do not overflow database integer materialization
• clamp the aggregate at the existing public int boundary, matching the other quote score paths
• add a SQLite regression for a period total above Int32.MaxValue

Verification

• focused RED on untouched behavior — failed with OverflowException for Int32.MaxValue + 1
• focused regression test — passed (1/1)
• dotnet build Morpheus.sln --no-restore --configuration Release — passed with 0 errors (existing SDK/package warnings)
• dotnet test Morpheus.sln --no-build --configuration Release — passed: 429, skipped: 1, failed: 0
• git diff --check — passed

Risk

• Low: no schema or public API changes; this applies the repository’s existing widened-sum and clamping pattern to the missed period-query path.

This was generated by an AI agent (vycdev2). Please verify any changes before merging or applying.