M44: harden release integrity and assurance

scripts/check-source-budgets.py

@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+"""Prevent known large modules from growing while they are incrementally decomposed."""
+
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+LINE_LIMITS = {
+    "backend/app/services/data_quality.py": 950,
+    "frontend/src/pages/DataQualityIssueDetail.tsx": 850,
+}
+BYTE_LIMITS = {"frontend/src/styles.css": 84_000}
+
+failures: list[str] = []
+for relative, limit in LINE_LIMITS.items():
+    count = len((ROOT / relative).read_text(encoding="utf-8").splitlines())
+    print(f"{relative}: {count}/{limit} lines")
+    if count > limit:
+        failures.append(relative)
+for relative, limit in BYTE_LIMITS.items():
+    count = (ROOT / relative).stat().st_size
+    print(f"{relative}: {count}/{limit} bytes")
+    if count > limit:
+        failures.append(relative)
+
+if failures:
+    raise SystemExit("Source budget exceeded; extract a focused module: " + ", ".join(failures))