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/schemas/tool/tool_type.py

@@ -82,8 +82,8 @@ class ToolTypeCreate(BaseModel):
     @classmethod
     def validate_default_port(cls, v: int, info) -> int:
         data = info.data
-        requires_port = data.get("requires_port", True)
-        if not requires_port:
+        requires_port = data.get("requires_port")
+        if requires_port is False:
             return v
         if v <= 0 or v > 65535:
             raise ValueError("Port must be between 1 and 65535")
@@ -140,7 +140,7 @@ class ToolTypeCreate(BaseModel):
 
             if not check_port_exposed(parsed, self.default_port):
                 raise ValueError(
-                    f"Port {self.default_port} is not exposed in the compose template. Add it to the 'ports' section."
+                    f"default_port {self.default_port} is not exposed in the compose template. Add it to the 'ports' section."
                 )
 
         return self