docs: make execution report example portable

.env.example

@@ -36,5 +36,5 @@ STRATEGY_PLUGIN_ALERT_TELEGRAM_CHAT_IDS=
 
 # ── Execution Report ──
 EXECUTION_REPORT_OUTPUT_DIR=/tmp/quant_runtime_reports
-EXECUTION_REPORT_GCS_URI=gs://qsl-runtime-logs-shared/execution-reports
+EXECUTION_REPORT_GCS_URI=gs://your-bucket/execution-reports
 QSL_EXECUTION_REPORT_GCS_URI=

tests/test_env_example.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+from pathlib import Path
+from urllib.parse import urlsplit
+
+
+ROOT = Path(__file__).resolve().parents[1]
+ENV_EXAMPLE = ROOT / ".env.example"
+
+
+def _env_value(name: str) -> str:
+    prefix = f"{name}="
+    matches = [
+        line.removeprefix(prefix)
+        for line in ENV_EXAMPLE.read_text(encoding="utf-8").splitlines()
+        if line.startswith(prefix)
+    ]
+    assert len(matches) == 1
+    return matches[0]
+
+
+def test_execution_report_gcs_uri_uses_public_placeholder() -> None:
+    value = _env_value("EXECUTION_REPORT_GCS_URI")
+
+    assert value == "gs://your-bucket/execution-reports"
+    parsed = urlsplit(value)
+    assert parsed.scheme == "gs"
+    assert parsed.netloc == "your-bucket"
+    assert parsed.path == "/execution-reports"
+    assert not parsed.query
+    assert not parsed.fragment