feat(sources): Wayback pass, automatic trimming, detention rule, ten cases re-sourced

Second and third rounds on the dossier pipeline, reviewed locally before commit.

Retrieval
- wayback_pass.py: retries every BLOCKED/DEAD/THIN/ERROR linked source through
  the Wayback Machine; blocks carry the snapshot date, archive URL and the live
  verdict. 143 slots retried: 93 fetched, 37 no snapshot, 12 script shells, 1 PDF.
- fetch_sources.py: fetch_wayback() helper.
- add_extra_sources.py: files staged extra_* finds (web search, not on the DB
  record) into the store with a provenance note.
- Cases re-sourced by web search: 248 (Oslo: Document.no, Avisa Oslo, NRK; the
  linked Le Parisien piece is case 242 and is marked OFF-CASE), 258 Kharkiv,
  260 Singapore, 358 Bangkok, 365 Las Vegas, 388 Verneuil-sur-Seine, 390 Zoersel,
  430 Homestead. 341 of 364 cases now hold a fetched article; 11, 66 and 399
  have no public text source (podcast, police video, direct victim report).

Trimming
- auto_trim.py: case-anchored furniture cut for UNTRIMMED blocks. Finds the body
  run that mentions the case, merges across subheadings and short furniture
  gaps, drops teasers, share bars, date/URL/caption lines and subscription
  pitches; refuses pages with no record term or almost no body. 302 blocks
  trimmed; 16 left on auto-trim-review.md (7 OFF-CASE suspects). Every cut is
  labelled AUTO-TRIMMED, UNREVIEWED in the dossier; the full extract stays in
  staging/. Decisions with anchors in trim-decisions-auto.json.
- build_cases.py / verify_all.py: banners for auto-trimmed and archived blocks,
  staged-file check extended to Wayback blocks, flag legend under the record.

Detention rule
- README "Definitions": the DB field `kidnappings` is the DETENTION violence
  type (victim, guard, staff or relative held to force submission or execute
  the theft), distinct from the Kidnapping scenario (taken away and held).
- detention-flag-review.md / detention-flag-corrections.json: 40 records
  reviewed with evidence; 30 set-to-1 proposals accepted by the owner on
  2026-09-06 (listed in corrections-approved.md), 10 still open.
- apply_detention_wording.py: "Violence Used" in the 70 reviewed summaries now
  names detention explicitly (62 of 70 labelled), supported by the summary's
  own text; idempotent; supersedes the batch scripts' wording.

Worklist and docs
- sofia-worklist.md: 248 decisions, detention rule item replacing the old
  "no abduction" item, fresh-search section for the textless cases.
- README-START-HERE.md: progress notes, run commands, next steps.
- Bug fixed in passing: Wayback blocks stored in-memory text with carriage
  returns; now stored as read back from disk.

verify_all.py PASSES (2321 checks).

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GZZENdTLzNGsbNy4DyF1yt

merge-output/staging/389/02_ouest-france-fr-wayback.txt

@@ -0,0 +1,14 @@
+« J’ai entendu des cris dans la rue... » : enlevé au petit matin pour ses cryptomonnaies près de Cholet
+
+Vous devez vous connecter pour afficher vos articles sauvegardés
+
+Un habitant du Maine-et-Loire a vécu un cauchemar ce vendredi 9 janvier. Comme l’ont révélé nos confrères d’Ouest France, des hommes l’ont ligoté et enlevé au petit matin à Saint-Léger-sous-Cholet, commune de 3 100 habitants, avant de le relâcher dans la matinée à 50 kilomètres de là, à Basse-Goulaine, au sud de Nantes.
+
+Information confirmée auprès du procureur de la République Éric Bouillard, qui nous a indiqué s’être dessaisi de l’affaire. L’enquête est désormais conduite par la Juridiction interrégionale spécialisée de Rennes (JIRS) et les auteurs du rapt sont depuis activement recherchés. L’homme enlevé, âgé de 43 ans, est ingénieur architecte logiciel. Son épouse, trois ans de moins, travaille au Centre hospitalier de Cholet.
+
+L’un de leurs voisins n’en...
+
+Ailleurs sur le Web
+ Contenus Sponsorisés
+
+Toute l'actualité en continu sur l'application.

merge-output/staging/389/index.json

@@ -19,11 +19,14 @@
     "field": "url_2",
     "url": "https://www.ouest-france.fr/societe/faits-divers/jai-entendu-des-cris-dans-la-rue-enleve-au-petit-matin-pour-ses-cryptomonnaies-pres-de-cholet-f97a7740-ed71-11f0-ae78-1a0629cc1f87",
     "host": "ouest-france.fr",
-    "fetched_at": "2026-08-06T13:45:05+00:00",
-    "verdict": "BLOCKED",
-    "method": "raw",
-    "http": 403,
-    "note": "raw request refused; try the WebFetch path, which is a model transcription and must be labelled as such"
+    "fetched_at": "2026-09-05T13:24:15+00:00",
+    "verdict": "FETCHED",
+    "method": "wayback",
+    "snapshot": "20260112122549",
+    "archive_url": "http://web.archive.org/web/20260112122549/https://www.ouest-france.fr/societe/faits-divers/jai-entendu-des-cris-dans-la-rue-enleve-au-petit-matin-pour-ses-cryptomonnaies-pres-de-cholet-f97a7740-ed71-11f0-ae78-1a0629cc1f87",
+    "chars": 1035,
+    "sha256": "fb01f53c6d11920a80221cca837c802269a81167fde505ef3439029fa7c3d27f",
+    "live_verdict": "BLOCKED"
   },
   {
     "case": 389,