fix: inttest runner crash and minio bucket-init proxy issue

- Remove --profiling-output arg from runner.yaml (plugin uses default path)
- Inline profiling hooks in root conftest.py with graceful fallback
- Replace mc-based bucket-init with Python urllib (no proxy interference)
- Add explicit ProxyHandler({}) to guarantee no proxy usage in bucket-init

tests/integration/conftest_profiling.py

@@ -16,27 +16,13 @@ import pytest
 
 from tests.integration.profiler import EndpointProfiler
 
+# ---------------------------------------------------------------------------
+# CLI option — registered by root conftest.py to ensure availability
+# ---------------------------------------------------------------------------
+
 DEFAULT_PROFILING_OUTPUT = "/tmp/profiling-report.json"
 
 
-# ---------------------------------------------------------------------------
-# CLI option
-# ---------------------------------------------------------------------------
-
-
-def pytest_addoption(parser: pytest.Parser) -> None:
-    """Add ``--profiling-output`` CLI flag to pytest."""
-    parser.addoption(
-        "--profiling-output",
-        action="store",
-        default=DEFAULT_PROFILING_OUTPUT,
-        help=(
-            "Path for the JSON profiling report "
-            f"(default: {DEFAULT_PROFILING_OUTPUT})"
-        ),
-    )
-
-
 # ---------------------------------------------------------------------------
 # Session-scoped profiler instance (shared across all tests)
 # ---------------------------------------------------------------------------