Semantic-search slice 1 (infra). Adds the pgvector plumbing the backfill worker and
hybrid search will use:
- swap the Postgres image to pgvector/pgvector:pg16 (drop-in for pg16 data)
- Pgvector + Pgvector.EntityFrameworkCore (0.2.0, EF8-compatible); UseVector() on the
runtime + design-time contexts
- Email.Embedding vector(768) column (nomic-embed-text dims), nullable, with an HNSW
cosine index; ignored under the InMemory test provider
- migration: CREATE EXTENSION vector + column + HNSW index
Verified against a real pgvector container: extension, HNSW, and cosine search work, and
the full EF round-trip (store a Pgvector.Vector, CosineDistance operator, nearest-first
ordering) applies all migrations and passes. No vulnerable packages. Build + all 41 tests
pass. Column stays null until Ollama generates embeddings (search falls back to lexical).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Backend security fixes from the Phase 1 register / Phase 2 roadmap (PR1 + V-01):
- V-01 SSRF: new SafeHttpGuard validates outbound unsubscribe URLs (scheme allowlist
+ DNS-resolve-and-block private/loopback/link-local/ULA/metadata ranges), wired into
UnsubscribeService; the "unsubscribe" HttpClient now disables auto-redirect so a
validated external URL can't 3xx into an internal target. +33 unit tests.
- V-04: session cookie SecurePolicy=Always in non-dev (SameAsRequest in dev).
- V-06: UseExceptionHandler/ProblemDetails in prod; Cleanup/Unsubscribe no longer
echo ex.Message to clients (logged server-side, generic message returned).
- V-08: ForwardedHeaders trusted only from configurable KnownNetworks (default private
ranges) + ForwardLimit, instead of trusting any client. New ForwardedHeaders config.
- V-09: returnUrl validated with Url.IsLocalUrl (no open redirect via OAuth flow).
- V-10: SearchService clamps Page/PageSize (<=200); Analytics clamps take/days.
- V-11: baseline security headers (nosniff, X-Frame-Options DENY, Referrer-Policy,
COOP) + HSTS in prod.
- V-13: /app/info discloses only devMode to anonymous callers unless dev mode is on.
- V-12: API container runs as non-root 'app' user (keys dir pre-owned).
- V-03: Postgres + API ports bound to 127.0.0.1; POSTGRES_PASSWORD now required (no
weak default fallback).
API compatibility preserved (clamps not rejections; error-body shape changes only on
failure paths). No DB migrations. Build + all 33 unit tests green. V-15 (MailKit
NU1902) persists across versions and the SMTP path is default-off — tracked, not bumped.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
cesnimda