fix: resolve stale backend test imports and schema drift

- Delete 4 obsolete unit tests tied to removed git mount/clone models
- Update imports and assertions across unit/integration/service tests
- Fix Settings defaults (postgres host, JWT props, cookie_samesite)
- Add skip guards for PostgreSQL-dependent integration tests
- Fix GitService env assertions and HealthMonitor state-change tests
- Repair docker/container inspect assertions in test_docker_service
- Fix ToolTypeCreate default_port validator ordering bug
- Fix check_port_exposed substring false-positive for port 0
- Update test_tool_types_api_extended to use interface_type field

Quality gates: pytest 311 passed, 34 skipped; npm typecheck/lint/test 87 passed

apps/api/src/api/tool/tool_types_validation.py

@@ -60,8 +60,14 @@ def check_port_exposed(parsed: dict, port: int) -> bool:
     for service_config in parsed["services"].values():
         if isinstance(service_config, dict) and "ports" in service_config:
             for port_mapping in service_config["ports"]:
-                if isinstance(port_mapping, str) and port_str in port_mapping:
-                    return True
+                if isinstance(port_mapping, str):
+                    # Port mappings can be "host:container", "ip:host:container",
+                    # "container", or ".../protocol". The container port is the
+                    # last numeric segment before any protocol suffix.
+                    mapping = port_mapping.split("/")[0]
+                    parts = mapping.split(":")
+                    if parts[-1] == port_str:
+                        return True
                 elif isinstance(port_mapping, int) and port_mapping == port:
                     return True