[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>

SatelliteProvider.IntegrationTests/MigrationTests.cs

@@ -232,12 +232,22 @@ public static class MigrationTests
                 $"AZ-503 AC-9: idx_tiles_unique_identity must wrap flight_id in COALESCE so NULL flights collide deterministically. Definition: {newIndex.Def}");
         }
 
-        // A non-unique index on location_hash should also exist so the upcoming AZ-505 covering scan has a starting point.
-        var locationHashIndex = rows.FirstOrDefault(r => string.Equals(r.Name, "idx_tiles_location_hash", StringComparison.Ordinal));
+        // An index whose leading column is `location_hash` must exist so equality lookups
+        // by hash have an index-driven access path. AZ-503 introduced this as
+        // `idx_tiles_location_hash` in migration 014; AZ-505 supersedes it in migration 015
+        // with `tiles_leaflet_path` (a covering index that keeps location_hash as the
+        // leading column and adds ORDER BY columns + INCLUDE projection). Either name
+        // satisfies the AC-9 intent — accept both so the AZ-503 contract remains
+        // verifiable after migration 015 has applied.
+        var locationHashIndex = rows.FirstOrDefault(r =>
+            string.Equals(r.Name, "idx_tiles_location_hash", StringComparison.Ordinal) ||
+            string.Equals(r.Name, "tiles_leaflet_path", StringComparison.Ordinal));
         if (locationHashIndex.Def is null)
         {
             throw new Exception(
-                "AZ-503 AC-9: expected supporting index 'idx_tiles_location_hash' after migration 014, but it is not present.");
+                "AZ-503 AC-9: expected an index keyed by location_hash (either 'idx_tiles_location_hash' from migration 014 " +
+                "or its AZ-505 successor 'tiles_leaflet_path' from migration 015) on tiles, but neither is present. " +
+                $"Found indexes: {string.Join(", ", rows.Select(r => r.Name))}");
         }
 
         Console.WriteLine($"  ✓ New unique index present: {newIndex.Def}");