Fix failing CI tests

- Update CLI tests to use correct ModelRegistry patch path (app.ModelRegistry)
- Add OMR_TEST_ALLOW_FAKE environment variable to ostruct test
- All 169 tests now passing

Fixes the 4 test failures from the GitHub Actions CI workflow.

Author: yaniv-golan

tests/test_cli.py

@@ -85,7 +85,7 @@ def test_root_help_json(self, cli_runner: CliRunner) -> None:
 class TestProviderResolution:
     """Test provider resolution precedence."""
 
-    @patch("openai_model_registry.cli.app.ModelRegistry")
+    @patch("openai_model_registry.cli.app.app.ModelRegistry")
     def test_cli_flag_precedence(self, mock_registry_class: MagicMock, cli_runner: CliRunner) -> None:
         """Test CLI flag takes precedence over environment."""
         mock_registry = Mock()
@@ -99,7 +99,7 @@ def test_cli_flag_precedence(self, mock_registry_class: MagicMock, cli_runner: C
         assert "azure" in result.output
         assert "CLI flag" in result.output
 
-    @patch("openai_model_registry.cli.app.ModelRegistry")
+    @patch("openai_model_registry.cli.app.app.ModelRegistry")
     def test_env_var_precedence(self, mock_registry_class: MagicMock, cli_runner: CliRunner) -> None:
         """Test environment variable precedence over default."""
         mock_registry = Mock()
@@ -113,7 +113,7 @@ def test_env_var_precedence(self, mock_registry_class: MagicMock, cli_runner: Cl
         assert "azure" in result.output
         assert "Environment variable" in result.output
 
-    @patch("openai_model_registry.cli.app.ModelRegistry")
+    @patch("openai_model_registry.cli.app.app.ModelRegistry")
     def test_default_precedence(self, mock_registry_class: MagicMock, cli_runner: CliRunner) -> None:
         """Test default provider when no CLI flag or env var."""
         mock_registry = Mock()

tests/test_fetch_pricing_ostruct.py

@@ -35,6 +35,7 @@ class _Res:  # minimal CompletedProcess stub
 
 
 @patch("subprocess.run", _fake_subprocess_run)  # noqa: D401
+@patch.dict("os.environ", {"OMR_TEST_ALLOW_FAKE": "1"})
 def test_run_ostruct_mock(tmp_path: Path) -> None:
     """Script returns dict and writes YAML deterministically."""
     # Ensure OUTPUT_DIR points to tmp