[AZ-577] [AZ-578] [AZ-579] [AZ-580] Implement E2E test batch 2

Adds 26 blackbox tests (FT-P-01..18, FT-N-01..08) covering full AC
matrices for Vehicles/Missions/Waypoints/Health/Errors. Three
spec-vs-code carry-forwards documented in batch_02_report.md and
pinned with [Trait("carry_forward", ...)].

Shared scaffolding: ApiDtos.cs, AssertProblemEnvelopeAsync helper,
Seeds.cs, StubSchema.cs, CascadeF3/F4 fixtures, PostgresStopStart
fixture (gated by COMPOSE_RESTART_ENABLED). Removes the 4 placeholder
Sanity.cs files (now superseded). docker-compose.test.yml gains the
expected_results volume mount + FIXTURE_SQL_DIR for the consumer.

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

docker-compose.test.yml

@@ -125,6 +125,9 @@ services:
       JWKS_MOCK_SIGN_URL: https://jwks-mock:8443/sign
       JWT_ISSUER: https://admin-test.azaion.local
       JWT_AUDIENCE: azaion-edge
+      ## Fixtures consumed by FixtureSql.Load (cascade_F3 / F4 in batch 2,
+      ## NFT-* fixtures in subsequent batches). Mounted read-only below.
+      FIXTURE_SQL_DIR: /app/fixtures
     depends_on:
       missions:
         condition: service_healthy
@@ -133,6 +136,7 @@ services:
     volumes:
       - ./test-results:/app/results
       - ./tests/jwks-mock-ca.crt:/usr/local/share/ca-certificates/jwks-mock-ca.crt:ro
+      - ./_docs/00_problem/input_data/expected_results:/app/fixtures:ro
     networks:
       - e2e-net
     profiles: