ci(titan-iac): infer coverage/loc metrics from quality summary artifacts

ci/scripts/publish_test_metrics.py

@@ -159,6 +159,47 @@ def _summary_int(summary: dict, key: str) -> int:
     return 0
 
 
+def _infer_workspace_coverage_percent(summary: dict, default_xml: str) -> float:
+    """Infer workspace line coverage from quality summary coverage XML metadata."""
+    results = summary.get("results", []) if isinstance(summary, dict) else []
+    coverage_xml = default_xml
+    for result in results:
+        if not isinstance(result, dict):
+            continue
+        if str(result.get("name") or "").strip().lower() != "coverage":
+            continue
+        candidate = str(result.get("coverage_xml") or "").strip()
+        if candidate:
+            coverage_xml = candidate
+            break
+    xml_path = Path(coverage_xml)
+    if not xml_path.exists():
+        return 0.0
+    try:
+        root = ET.parse(xml_path).getroot()
+        line_rate = root.attrib.get("line-rate")
+        if line_rate is None:
+            return 0.0
+        return float(line_rate) * 100.0
+    except (ET.ParseError, OSError, ValueError):
+        return 0.0
+
+
+def _infer_source_lines_over_500(summary: dict) -> int:
+    """Infer over-limit source file count from hygiene issue payloads."""
+    results = summary.get("results", []) if isinstance(summary, dict) else []
+    for result in results:
+        if not isinstance(result, dict):
+            continue
+        if str(result.get("name") or "").strip().lower() not in {"hygiene", "loc", "smell"}:
+            continue
+        issues = result.get("issues")
+        if not isinstance(issues, list):
+            continue
+        return sum(1 for item in issues if isinstance(item, str) and item.startswith("file exceeds"))
+    return 0
+
+
 def _normalize_result_status(value: str | None, default: str = "failed") -> str:
     """Map arbitrary check status text into canonical check result buckets."""
     if not value:
@@ -394,7 +435,11 @@ def main() -> int:
     status = "ok" if exit_code == 0 else "failed"
     summary = _load_summary(summary_path)
     workspace_line_coverage_percent = _summary_float(summary, "workspace_line_coverage_percent")
+    if workspace_line_coverage_percent <= 0:
+        workspace_line_coverage_percent = _infer_workspace_coverage_percent(summary, "build/coverage-unit.xml")
     source_lines_over_500 = _summary_int(summary, "source_lines_over_500")
+    if source_lines_over_500 <= 0:
+        source_lines_over_500 = _infer_source_lines_over_500(summary)
     sonarqube_report = _load_optional_json(os.getenv("QUALITY_GATE_SONARQUBE_REPORT", "build/sonarqube-quality-gate.json"))
     supply_chain_report = _load_optional_json(os.getenv("QUALITY_GATE_IRONBANK_REPORT", "build/ironbank-compliance.json"))
     supply_chain_required = os.getenv("QUALITY_GATE_IRONBANK_REQUIRED", "0").strip().lower() in {"1", "true", "yes", "on"}