Improve object normalization: shorter keys, synonym expansion, qualifier stripping

- Truncate object keys to 40 chars (was 80) at underscore boundary
- Strip German qualifying prepositional phrases (bei/für/gemäß/von/zur/...)
- Add 65 new synonym mappings for near-duplicate patterns found in analysis
- Strip trailing noise tokens (articles/prepositions)
- Add _truncate_at_boundary() helper and _QUALIFYING_PHRASE_RE regex
- 11 new tests for normalization improvements (227 total pass)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-compliance/tests/test_decomposition_pass.py

@@ -974,6 +974,76 @@ class TestObjectNormalization:
         assert "ue" in result
         assert "ä" not in result
 
+    # --- New tests for improved normalization (2026-03-28) ---
+
+    def test_qualifying_phrase_stripped(self):
+        """Prepositional qualifiers like 'bei X' are stripped."""
+        base = _normalize_object("Eskalationsprozess")
+        qualified = _normalize_object(
+            "Eskalationsprozess bei Schwellenwertüberschreitung"
+        )
+        assert base == qualified
+
+    def test_fuer_phrase_stripped(self):
+        """'für kritische Systeme' qualifier is stripped."""
+        base = _normalize_object("Backup-Verfahren")
+        qualified = _normalize_object("Backup-Verfahren für kritische Systeme")
+        assert base == qualified
+
+    def test_gemaess_phrase_stripped(self):
+        """'gemäß Artikel 32' qualifier is stripped."""
+        base = _normalize_object("Verschlüsselung")
+        qualified = _normalize_object("Verschlüsselung gemäß Artikel 32")
+        assert base == qualified
+
+    def test_truncation_at_40_chars(self):
+        """Objects truncated at 40 chars at word boundary."""
+        long_obj = "interner_eskalationsprozess_bei_schwellenwertueberschreitung_und_mehr"
+        result = _normalize_object(long_obj)
+        assert len(result) <= 40
+
+    def test_near_synonym_erkennung(self):
+        """'Früherkennung' and 'frühzeitige Erkennung' collapse."""
+        a = _normalize_object("Früherkennung von Anomalien")
+        b = _normalize_object("frühzeitige Erkennung von Angriffen")
+        assert a == b
+
+    def test_near_synonym_eskalation(self):
+        """'Eskalationsprozess' and 'Eskalationsverfahren' collapse."""
+        a = _normalize_object("Eskalationsprozess")
+        b = _normalize_object("Eskalationsverfahren")
+        assert a == b
+
+    def test_near_synonym_meldeprozess(self):
+        """'Meldeprozess' and 'Meldeverfahren' collapse to notification."""
+        a = _normalize_object("Meldeprozess")
+        b = _normalize_object("Meldeverfahren")
+        assert a == b
+
+    def test_near_synonym_ueberwachung(self):
+        """'Überwachung' and 'Monitoring' collapse."""
+        a = _normalize_object("Überwachung")
+        b = _normalize_object("Monitoring")
+        assert a == b
+
+    def test_trailing_noise_stripped(self):
+        """Trailing articles/prepositions are stripped."""
+        result = _normalize_object("Schutz der")
+        assert not result.endswith("_der")
+
+    def test_vendor_synonyms(self):
+        """Lieferant/Dienstleister/Auftragsverarbeiter collapse to vendor."""
+        a = _normalize_object("Lieferant")
+        b = _normalize_object("Dienstleister")
+        c = _normalize_object("Auftragsverarbeiter")
+        assert a == b == c
+
+    def test_patch_mgmt_synonyms(self):
+        """Patchmanagement/Aktualisierung collapse."""
+        a = _normalize_object("Patchmanagement")
+        b = _normalize_object("Softwareaktualisierung")
+        assert a == b
+
 
 # ---------------------------------------------------------------------------
 # GAP 5: OUTPUT VALIDATOR TESTS