[AZ-505] AC-5 fix: enable TLS for HTTP/2 via ALPN

Kestrel with HttpProtocols.Http1AndHttp2 on a plaintext listener
silently downgrades to HTTP/1.1-only (logs "HTTP/2 is not enabled
... TLS is not enabled"), so AC-5's multiplexed-GET test failed
with HTTP_1_1_REQUIRED. ALPN cannot run over plaintext, so the
fix switches the dev listener to TLS on https://+:8080:

- scripts/run-tests.sh generates a self-signed dev cert idempotently
  (./certs/api.pfx + api.crt) via openssl in an alpine container;
  certs/ is gitignored.
- docker-compose.yml binds Kestrel to ASPNETCORE_URLS=https://+:8080
  with Kestrel__Certificates__Default__Path bound to the .pfx.
- docker-compose.tests.yml mounts api.crt into the integration-tests
  container's CA store and runs update-ca-certificates so HttpClient
  trusts the cert transparently; default API_URL is now https://api:8080.
- Drop the obsolete Http2UnencryptedSupport AppContext switch from
  Http2MultiplexingTests; ALPN over TLS handles negotiation.

Test-data fixes caught on the post-TLS rerun (independent of the TLS
switch but surfaced together):

- Http2MultiplexingTests: switch slippy coords from (154321, 95812)
  -- which Google Maps returns 404 for -- to (158485, 91707), the
  slippy projection of (47.461747, 37.647063) already exercised by
  JwtIntegrationTests.
- TileInventoryTests + LeafletPathIndexOnlyTests: SpecifyKind to
  Unspecified at the binding site for raw Npgsql seed paths writing
  into tiles.captured_at / created_at / updated_at (TIMESTAMP without
  tz). Npgsql v6+ refuses Kind=Utc into plain timestamp columns;
  production goes through Dapper and never hits this code path.
- MigrationTests Az503NewUniqueIndexCoversIntegerKeyAndFlightId:
  accept either idx_tiles_location_hash (migration 014) or its
  AZ-505 successor tiles_leaflet_path (migration 015) -- both have
  location_hash as the leading column, which is the AC-9 intent.

Docs updated to reflect the TLS+ALPN path: tile-inventory.md
Non-Goals, modules/api_program.md, module-layout.md, the AZ-505
task spec's Risk 3, and the cycle 6 implementation + completeness
reports. The full integration test suite passes (mode=full, exit 0).

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.yml

@@ -24,9 +24,16 @@ services:
     ports:
       - "18980:8080"
       - "18981:8081"
+    # AZ-505 AC-5: HTTPS is required for HTTP/2 via ALPN (Kestrel silently
+    # disables HTTP/2 on plaintext endpoints). The cert is self-signed,
+    # dev-only — generated by scripts/run-tests.sh and gitignored under
+    # ./certs/. The integration-tests container installs the matching
+    # public cert into its OS CA store so every HttpClient trusts it.
     environment:
       - ASPNETCORE_ENVIRONMENT=Development
-      - ASPNETCORE_URLS=http://+:8080
+      - ASPNETCORE_URLS=https://+:8080
+      - ASPNETCORE_Kestrel__Certificates__Default__Path=/app/certs/api.pfx
+      - ASPNETCORE_Kestrel__Certificates__Default__Password=satellite-dev-cert
       - ConnectionStrings__DefaultConnection=Host=postgres;Port=5432;Database=satelliteprovider;Username=postgres;Password=postgres
       - MapConfig__ApiKey=${GOOGLE_MAPS_API_KEY}
       - JWT_SECRET=${JWT_SECRET}
@@ -36,6 +43,7 @@ services:
       - ./tiles:/app/tiles
       - ./ready:/app/ready
       - ./logs:/app/logs
+      - ./certs/api.pfx:/app/certs/api.pfx:ro
     depends_on:
       postgres:
         condition: service_healthy