Replace .ToArray() with collection spread, simplify single-statement
await using blocks, use Lock for Postgres schema gates, and document
IDE0063/IDE0305/IDE0330/CA1859 conventions in csharp-style.md.
Update decomposition docs for E7M3-03, add in-memory read-clamp test via
test seed hook, fix empty factionId deny code, AAA integration test,
Postgres FK orchestration notes, and strike review suggestions Done.
Per-player IFactionStandingStore with clamped reads/writes and fail-closed
unknown-faction deny; append-only IReputationDeltaStore; in-memory plus
Postgres V009/V010 when configured. Tests, Bruno health smoke, README.