feat(sources): fetch linked URLs for the 252 spreadsheet-only cases

Until now only cases 357+ (plus a few older ones) had their linked URLs
fetched; the other 252 dossiers held just the text pasted into the
spreadsheet, often only the lede. This pass fetches every linked URL for
those cases so the full text is on file before link rot takes it.

- stage_all.py: new --include-sheet-cases flag that lifts the skip on
  cases holding spreadsheet articles. Resumable as before.
- staging/: raw extracts and index.json for the 252 cases.
- sourced-articles.json, case-files-manifest.json: 188 new UNTRIMMED
  blocks. 179 cases gained at least one fetched article; 73 got none
  (49 BLOCKED, 18 THIN, 9 DEAD, 4 video/social, 3 ERROR).
- sources/*.txt: rebuilt with build_cases.py --all. Sheet pastes are
  kept; fetched blocks sit beside them under the NOT YET TRIMMED banner.
  Files previously committed with CRLF are now LF.
- wayback-availability.json: Wayback snapshots exist for 73 of the 98
  failed URL slots; input for an archive-fetch pass.
- README-START-HERE.md: progress note and next step.

verify_all.py PASSES (1836 checks).

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

merge-output/staging/182/01_indianexpress-com.txt

@@ -0,0 +1,51 @@
+Weeks after Pune trading coach robbed at knifepoint loses cryptocurrency worth Rs 16 lakh, 5 held | Pune News - The Indian Express
+
+This is an archive article published on August 16, 2024
+
+Weeks after Pune trading coach robbed at knifepoint loses cryptocurrency worth Rs 16 lakh, 5 held
+
+The five men abducted a share trading coach from Bavdhan after approaching him on the pretext of getting information about his stock market course.
+
+2 min readPuneUpdated: Aug 16, 2024 10:27 AM IST
+
+According to the police, on July 22, the accused approached the coach seeking information about his stock market course. They then allegedly asked him to accompany them, saying they wanted guidance to invest in shares and took him in a car from Balewadi to Shikrapur. (File/representational)
+
+The Pune city police arrested five people this week for allegedly abducting a 26-year-old share trading coach from Pune’s Bavdhan and stealing cryptocurrency worth Rs 16 lakh from him at knifepoint last month, officials said on Thursday.
+
+The police identified the accused as Mayur Kailas Amodkar, 25, Manish Rajendra Bhonde, 24, Bhushan Gokul Koli, 27, Jitendra Pradip Wagh, 33, and Chandrakant Ramesh Deshmukh, 34, all residents of Jalgaon.
+
+According to the police, on July 22, the accused approached the coach seeking information about his stock market course. They then allegedly asked him to accompany them, saying they wanted guidance to invest in shares and took him in a car from Balewadi to Shikrapur.
+
+ALSO READ | Explained: Digital currencies and how they work
+
+Threatening to kill him with a knife, the accused allegedly snatched the man’s mobile phone and forcibly transferred his USDT cryptocurrency estimated at Rs 16,02,510 to his USDT ‘deposit address’ using a mobile app. The accused then released the share trading coach at around 6 pm, three hours after they abducted him, the police said.
+
+The victim then lodged a First Information Report (FIR) at the Chaturshringi police station.
+
+Following an investigation, a team led by Pranil Chougule, Sub-Inspector, initially arrested Amodkar and Bhonde from Jalgaon. Three other accused were arrested later for their alleged involvement in the crime.
+
+The police said the stolen cryptocurrency worth Rs 7.94 lakh has been recovered. The car and knife used by the accused for allegedly committing the offence have also been seized, a press release issued by Mahesh Bolkotgi, Senior Police Inspector, said on Thursday. “The accused have been arrested this week and are currently under magisterial custody as per the orders of a court,” Bolkotgi said.
+
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merge-output/staging/182/index.json

@@ -0,0 +1,16 @@
+[
+  {
+    "case": 182,
+    "n": 1,
+    "field": "url",
+    "url": "https://indianexpress.com/article/cities/pune/pune-man-robbed-loses-cryptocurrency-9517117/",
+    "host": "indianexpress.com",
+    "fetched_at": "2026-09-05T12:50:24+00:00",
+    "verdict": "FETCHED",
+    "method": "raw",
+    "http": 200,
+    "chars": 3725,
+    "sha256": "695f699bd97899aadf44799d41cf7f9b8dc10d95aa4e3a4b6eebec5ae351442d",
+    "final_url": null
+  }
+]