feat(audit): Phase 2+3 — P54 + P68 + P69 + P6/P53/P55 + P31 + P80v2

P54 — consent_diff_for_user.py: USP-Feature fuer wiederkehrende Besucher.
compute_user_facing_diff() vergleicht aktuellen Snapshot mit letztem fuer
gleiche site_domain → added_vendors / removed_vendors / requires_reconsent
wenn neue Marketing-Vendors hinzugekommen. build_diff_banner_snippet()
liefert HTML zum Einbau in eigenen Banner via consent-sdk.

P68 — reverse_audit.py: Self-Audit unserer Template-Bibliothek.
run_reverse_audit() laedt alle MCs aus doc_check_controls + alle Templates
aus doc_templates, prueft per pass_criteria-Match welche MCs durch
mindestens 1 Template abgedeckt sind. Liefert coverage_pct, uncovered_mcs
(Top HIGH zuerst), unused_templates, by_doctype-Breakdown.

P69 — data/ecall_regulation.json: eCall-VO (EU) 2015/758 als 7 Chunks
fuer RAG-Ingest (Art. 3/6/7 + compliance_implications fuer Automotive-OEMs).
Standortdaten ausserhalb Notfall = unzulaessig; Mehrwertdienste brauchen
separate Einwilligung; Daten sofort loeschen nach Notruf.

P6+P53+P55 — industry_library.py: Branchen-Profile (automotive/ecommerce/
saas/banking/healthcare) mit mandatory_regulations + typical_cookie_vendors
+ vvt_required_processes + special_findings_to_watch. load_site_profile()
liest Site-Historie aus snapshots (common_provider, avg_vendors,
historical_runs). build_industry_context_block_html() rendert Block am
Mail-Anfang: 'Was wir in dieser Branche bei VW pruefen' + 'Wir haben
diese Site bereits 3× analysiert'.

P31 — llm_cascade.py: Tiered LLM-Cascade Qwen → OVH 120B → Anthropic
Claude Haiku mit Confidence-Heuristik (JSON parsed, items count vs
input size). Valkey-Cache (redis://) mit 7-Tage-TTL plus In-Process-
Fallback. Wenn Tier-1 unter Confidence-Threshold → Tier-2, dann Tier-3.
Reduziert Lauf-Zeit drastisch bei Re-Runs.

P80 v2 — check_replay.py: replay nutzt jetzt audit_quality_checks
mit den Snapshot-Daten. Auch alte Snapshots zeigen jetzt im Replay
ob banner_detected fehlt / vendor_extract thin ist.

Bonus — P90 BMW-Final markiert completed: alle B1-B4 Bugs gefixt
(cmp_payloads keep, cookies_detailed wiring, multi-doc-fail visibility,
VVT-Tabelle).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend-compliance/compliance/api/agent_compliance_check_routes.py

@@ -1486,6 +1486,23 @@ async def _run_compliance_check(check_id: str, req: ComplianceCheckRequest):
         except Exception as e:
             logger.warning("P71 jc_avv_decision skipped: %s", e)
 
+        # P6/P53/P55 — Branchen-Kontext + Site-History
+        industry_ctx_html = ""
+        try:
+            from compliance.services.industry_library import (
+                build_industry_context_block_html, load_site_profile,
+            )
+            from database import SessionLocal as _SLib
+            _ind_db = _SLib()
+            try:
+                ind = (req.scan_context or {}).get("industry") if req.scan_context else None
+                site_prof = load_site_profile(_ind_db, domain_for_exec or "")
+                industry_ctx_html = build_industry_context_block_html(ind, site_prof)
+            finally:
+                _ind_db.close()
+        except Exception as e:
+            logger.warning("industry context skipped: %s", e)
+
         # P85 — Banner-Screenshot fuer visuellen Beweis (zwischen
         # GF-1-Pager und Detail-Bloecken)
         banner_shot_html = ""
@@ -1596,6 +1613,7 @@ async def _run_compliance_check(check_id: str, req: ComplianceCheckRequest):
             + critical_html + scope_disclaimer_html + exec_summary_html
             + cookie_arch_html + summary_html + scanned_html + profile_html
             + scorecard_html + redundancy_html
+            + industry_ctx_html
             + banner_shot_html
             + providers_html + banner_deep_html
             + cookie_audit_html