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Perf re-baseline (HotPathLatencyTests): empirical p95 on Apple M-series Release build: 4KB DetailsJson slow path ≈14 µs, small-DetailsJson no-redactors ≈2 µs, true no-op fast path ≈0 µs. Thresholds updated: 200 µs / 30 µs / 5 µs (≈15× headroom for contested CI runners). Old thresholds (50 µs / 10 µs) were set for the pre-C3 typed-field path; canonical JSON parse+rewrite is empirically faster. Adds a third test (Filter_Apply_NoDetailsJson_FastPath) that asserts same-instance return on the DetailsJson-null + within-cap fast path. Env-var overrides retained. CollapseAuditLogToCanonicalMigrationTests (new): three MSSQL-gated [SkippableFact] tests verifying Action/Category/Outcome projection, NULL Actor, DetailsJson codec round-trip, and all six persisted computed columns (Kind/Status/SourceSiteId/ ExecutionId/ParentExecutionId) for ApiOutbound, InboundAuthFailure, and Failed- status rows. AddAuditLogTableMigrationTests: rename CreatesFiveNamedIndexes → CreatesNineNamedIndexes; expand coverage from 5 original indexes to all 9 named non-clustered indexes present after CollapseAuditLogToCanonical (adds IX_AuditLog_Execution, IX_AuditLog_ParentExecution, IX_AuditLog_Node_Occurred, UX_AuditLog_EventId). Dead-cref cleanup: zero references to the deleted IAuditPayloadFilter / DefaultAuditPayloadFilter / SafeDefaultAuditPayloadFilter types remain in any .cs file (source or test). 26 occurrences across 13 files replaced with correct references to IAuditRedactor / ScadaBridgeAuditRedactor / SafeDefaultAuditRedactor or reworded as plain prose. Residual sweep: no unused transitional code found beyond the acknowledged "C3 transitional shim" comments on IngestedAtUtc stamping (active code, not dead).