fix: 0% completeness bug — SCORE finding was not generated at 100%

Root cause: When all 9 Art. 13 checks passed (100%), no SCORE finding
was created (line: 'if pct < 100'). The backend then defaulted to
completeness=0 because it looked for the SCORE finding to extract the %.

Fix: Always generate SCORE finding, even at 100%. Added 'OK' severity
for fully compliant documents.

This was the cause of 8 documents showing '0% MANGELHAFT' despite
containing all required information.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

backend-compliance/compliance/services/dsi_document_checker.py

@@ -208,21 +208,20 @@ def check_document_completeness(
         else:
             present += 1
 
-    # Add summary finding
+    # Always add summary finding (even at 100% — needed for completeness tracking)
     if total > 0:
         pct = round(present / total * 100)
-        if pct < 100:
-            findings.insert(0, {
-                "code": f"DSI-SCORE-{doc_type.upper()}",
-                "severity": "LOW" if pct >= 80 else "MEDIUM" if pct >= 50 else "HIGH",
-                "text": (
-                    f"'{doc_title}': {present}/{total} Pflichtangaben vorhanden ({pct}%). "
-                    f"Fehlend: {total - present} Angaben nach {label}."
-                ),
-                "doc_title": doc_title,
-                "doc_url": doc_url,
-                "doc_type": doc_type,
-            })
+        findings.insert(0, {
+            "code": f"DSI-SCORE-{doc_type.upper()}",
+            "severity": "OK" if pct == 100 else "LOW" if pct >= 80 else "MEDIUM" if pct >= 50 else "HIGH",
+            "text": (
+                f"'{doc_title}': {present}/{total} Pflichtangaben vorhanden ({pct}%)."
+                + (f" Fehlend: {total - present} Angaben nach {label}." if pct < 100 else "")
+            ),
+            "doc_title": doc_title,
+            "doc_url": doc_url,
+            "doc_type": doc_type,
+        })
 
     return findings