fix(compliance-check): always render 8 doc types + 4 BMW GT-gap fixes

Always-show-8 (user-requested):
- agent_compliance_check_routes.py: _pad_results_with_missing pads the
  results list to always include all 8 canonical doc_types in canonical
  order. Missing types get a placeholder DocCheckResult with error=
  'Nicht eingereicht' + scenario='missing'.
- agent_doc_check_report.py: NICHT EINGEREICHT status label (neutral),
  friendly grey body block instead of red error.
- ChecklistView.tsx: 'Nicht eingereicht' chip (neutral grey, not red
  'Fehler'); SCENARIO_LABELS adds missing entry + header chip counter.

Impressum-Regression fix (#18):
- _fetch_text(url, doc_type): cookie/dse/social_media -> max_documents=1
  (CMP capture authoritative, sub-pages dilute). Other types -> =3
  (Impressum needs Versicherungsvermittler, Aufsicht, Berufsrecht sub-
  pages). 15s networkidle bail keeps timing safe.

ODR/Verbraucherstreitbeilegung filter (#19):
- _apply_profile_filter: when profile.needs_odr=True (B2C), override the
  check's default B2B-oriented hint with action-oriented B2C guidance
  pointing at Art. 14 EU-VO 524/2013 + §36 VSBG. Previously the check
  contradicted itself: 'profile says B2C' + hint 'only relevant for B2C
  online vendors'.

Registergericht regex (#20):
- impressum_checks.py: accept colon/dot/dash between keyword and city
  (BMW writes 'registergericht: münchen hrb 42243'). Add 'sitz und
  registergericht: X' as separate pattern.

Industry detection (#21):
- business_profiler.py: 'automotive' keywords broadened (antriebs,
  motor, leasing, werkstatt, probefahrt, plus brand names BMW/Mercedes/
  Audi/VW/Porsche/Opel). 'it_services' keywords narrowed — software/
  cloud/hosting are mentioned in every privacy policy and were biasing
  the result toward IT for any tech-aware company.

backend-compliance/compliance/services/doc_checks/impressum_checks.py

@@ -111,9 +111,16 @@ IMPRESSUM_CHECKLIST = [
         "label": "Registergericht benannt (Amtsgericht X)",
         "level": 2, "parent": "register",
         "patterns": [
-            r"(?:amtsgericht|registergericht)\s+[a-zA-Z\u00c0-\u017e]\w+",
+            # "Amtsgericht <Stadt>" or "Registergericht <Stadt>"
+            # Allow colon/dot/dash between keyword and city (BMW writes
+            # "registergericht: m\u00fcnchen hrb 42243").
+            r"(?:amtsgericht|registergericht)[\s:\.\-,]+[a-zA-Z\u00c0-\u017e]\w+",
+            # "AG <Stadt>" short form
             r"\bag\s+[a-zA-Z\u00c0-\u017e]\w+",
+            # "Handelsregister AG/Amtsgericht <Stadt>"
             r"(?:handelsregister|register)\s+(?:ag|amtsgericht)\s+\w+",
+            # "Sitz und Registergericht: M\u00fcnchen" \u2014 BMW pattern
+            r"sitz\s+und\s+registergericht[\s:\.\-,]+[a-zA-Z\u00c0-\u017e]\w+",
         ],
         "severity": "LOW",
         "hint": "Registergericht benennen (z.B. 'Amtsgericht Freiburg' oder 'AG Freiburg'). Beides ist korrekt.",