fix(cli): use container DI override for correction service mock in integration test

The plan_correct_isolated_resolve robot helper patched CorrectionService
at the module level, but correct_decision now resolves the service via
container.correction_service(). The module-level patch had no effect on
the container's already-imported reference, causing the mock to never
intercept the call and the test to fail with exit code 1.

Replace unittest.mock.patch with container.correction_service.override()
which is the idiomatic dependency-injector mechanism and correctly
intercepts the singleton provider.

ISSUES CLOSED: #1025

robot/helper_plan_correct_isolated_resolve.py

@@ -13,7 +13,7 @@ import os
 import tempfile
 from pathlib import Path
 from types import SimpleNamespace
-from unittest.mock import MagicMock, patch
+from unittest.mock import MagicMock
 
 from typer.testing import CliRunner
 from ulid import ULID
@@ -90,10 +90,8 @@ def run_regression() -> int:
         )
 
         runner = CliRunner()
-        with patch(
-            "cleveragents.application.services.correction_service.CorrectionService",
-            return_value=fake_svc,
-        ):
+        container = get_container()
+        with container.correction_service.override(fake_svc):
             result = runner.invoke(
                 plan_app,
                 [