feat: student scan filters — skip GPS images and min CPR threshold

New profile options to reduce noise when scanning student accounts:

- skip_gps_images: images flagged solely by GPS coordinates are suppressed.
  GPS data is still extracted and shown in the detail card when the item
  is flagged by another signal (faces, EXIF author/comment).

- min_cpr_count (default 1): only flag a file if it contains at least N
  distinct CPR numbers. Deduplication is by value. Faces and EXIF PII
  still trigger flags regardless of CPR count.

Both options apply to M365, Google, and file scan paths. Saved in profiles
and editable in the Profile Manager editor. Docs, manuals, i18n (DA/EN/DE),
CHANGELOG, and VERSION (1.6.14 → 1.6.15) updated.

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

lang/da.json

@@ -559,6 +559,10 @@
   "m365_db_import_run": "Importer",
   "m365_opt_scan_photos": "Søg efter ansigter i billeder",
   "m365_opt_scan_photos_hint": "Markerer billeder med registrerede ansigter som Art. 9 biometriske data. Langsommere — aktivér efter behov.",
+  "m365_opt_skip_gps": "Ignorer GPS i billeder",
+  "m365_opt_skip_gps_hint": "Billeder med GPS-koordinater flagges ikke — nyttigt ved elevscanninger, hvor smartphones indlejrer placering i alle fotos.",
+  "m365_opt_min_cpr": "Min. CPR-antal pr. fil",
+  "m365_opt_min_cpr_hint": "Filer med færre distinkte CPR-numre end denne tærskel rapporteres ikke. Sæt til 2 for at undgå falske positive, når elever har egne CPR-numre i filer.",
   "m365_filter_photo_only": "📷 Billeder / biometrisk",
   "m365_badge_faces": "ansigter",
   "a30_photo_items": "Billeder med registrerede ansigter (Art. 9 biometrisk)",