Summary

• replace the inherited cross-assembly Principal projection with concrete PersonProjection and GroupProjection aggregates
• upgrade Marten to 9.23.0 and WolverineFx.Marten/runtime compilation to 6.27.1
• preserve the existing bigint mt_version schema explicitly for upgrade compatibility
• serialize interactive projection rebuilds against the live daemon to remove the progression-row race in integration tests
• update rebuild/recovery paths, regression coverage, and operator/authorization documentation

Verification

• dotnet build src/dotnet/Modgud.slnx -c Release --no-restore
• unit tests: 1,505 passed
• integration tests: 597 passed (full suite, 21m06s)
• package vulnerability scan: no vulnerable NuGet packages found
• release Docker image upgraded a restored v0.9.0 local database successfully; principal counts and bigint revisions preserved
• live login, user CRUD, full projection rebuild, and post-rebuild reads succeeded through Caddy
• k6 control load: 3,469 requests at 10 VUs, 0 failures, p95 72 ms; 50-VU stress also exercised recovery and exposed the existing local DB-pool capacity ceiling without projection corruption