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master bc4318ef97 Add tests for SBOM generation determinism across multiple formats 
- Created `StellaOps.TestKit.Tests` project for unit tests related to determinism.
- Implemented `DeterminismManifestTests` to validate deterministic output for canonical bytes and strings, file read/write operations, and error handling for invalid schema versions.
- Added `SbomDeterminismTests` to ensure identical inputs produce consistent SBOMs across SPDX 3.0.1 and CycloneDX 1.6/1.7 formats, including parallel execution tests.
- Updated project references in `StellaOps.Integration.Determinism` to include the new determinism testing library.
2025-12-23 18:56:12 +02:00

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PostgreSQL patterns

Row-level security (RLS)

  • Require tenant context via app.tenant_id session setting.
  • Policies filter by tenant_id on all tenant-scoped tables.
  • Admin operations use explicit bypass roles and audited access.

Validating RLS

  • Run staging tests that attempt cross-tenant reads and writes.
  • Use deterministic replay tests for RLS regressions.

Bitemporal unknowns

  • Store current and historical states with valid_from and valid_to.
  • Support point-in-time queries and deterministic ordering.

Time-based partitioning

  • Partition high-volume tables by time.
  • Pre-create future partitions and archive old partitions.
  • Use deterministic maintenance checklists for partition health.

Generated columns

  • Use generated columns for derived flags and query optimization.
  • Add columns via migrations and backfill deterministically.

Troubleshooting

  • RLS failures: verify tenant context and policy attachment.
  • Partition issues: check missing partitions and default tables.
  • Bitemporal queries: confirm valid time windows and index usage.

Related references

  • data/postgresql-operations.md
  • security/multi-tenancy.md
  • docs/operations/postgresql-patterns-runbook.md