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/029/01_businessinsider-com.txt

@@ -0,0 +1,82 @@
+Bitcoin Raid, Moulsford: Transfer Failed, Thieves Got Nothing - Business Insider
+
+Armed raiders who held 2 bitcoin traders at gunpoint in rural England didn't actually manage to steal anything
+
+Copy link
+ 
+ 
+ Email
+ 
+ 
+ Facebook
+ 
+ 
+ WhatsApp
+ 
+ 
+ X
+ 
+ 
+ LinkedIn
+ 
+ 
+ Bluesky
+ 
+ 
+ Threads
+ 
+ 
+ Impact Link
+
+This story is available exclusively to Business Insider
+ subscribers. Become an Insider
+ and start reading now.
+ Have an account? .
+
+Armed criminals attacked a home in Oxfordshire, Britain, last month.
+
+It was the registered address of a cryptocurrency company.
+
+Four men broke in and tried to force inhabitants to make a transfer.
+
+But it failed and the raiders left with nothing, police said.
+
+Officers are still looking for the men and issued descriptions.
+
+Armed burglars who broke into the home of two British bitcoin traders and held them at gunpoint didn't actually manage to steal any cryptocurrency, police have said.
+
+Four men, who are now on the run from Thames Valley Police, tried to force two traders to transfer a large quantity of bitcoin after kicking down the door of a home in rural Moulsford, Oxfordshire, on January 22.
+
+The raid was carried out on the home of Danny Aston and his girlfriend Amy Jay, who had used it as the registered address of their business, Aston Digital Currencies.
+
+But, according to an update on the case more than a week later, the transfer didn't actually work. They did not take any material possessions either, meaning they left empty-handed.
+
+A statement released on Tuesday by Thames Valley Police described the incident:
+
+"The offenders threatened the two men and a woman who were inside the property, with what appeared to be a firearm and demanded one of the occupants to transfer bitcoins electronically to another account.
+
+"The victim was struck to his head but was not seriously injured during the incident. He attended the John Radcliffe Hospital and was later discharged. Nothing was stolen during the incident."
+
+The Oxford Mail local newspaper confirmed with the police force that the transfer did not work, and were told by a spokesman: "It's correct to say that the attempted transaction of bitcoins failed."
+
+Take a smarter break in your day - and see how far you get.
+
+Want more Business Insider in your news feed?
+
+Add BI in Google so our reporting is easier to find when you’re searching for what matters.
+
+Police also released slightly more detail on the suspects, describing their race (three were black, one was white) and what they were wearing ("tracksuits/sports clothing").
+
+Officers are still looking for the men. They asked anybody with dashcam video footage or other evidence from the morning of the raid to contact them.
+
+Police have not issued further information on who the men might have been, but suggested that the raid "may be a targeted incident," implying a level of sophistication beyond that of small-time criminals.
+
+Cryptocurrency and crime are overlapping more and more since the dramatic spike in the value of leading currencies like bitcoin.
+
+Officers from London's Metropolitan Police told Business Insider towards the end of last year that bitcoin is so widely used in the city that even regular drug dealers are using it to launder their takings.
+
+Check out Business Insider's picks for best cryptocurrency exchanges
+
+Business Insider tells the innovative stories you want to know
+
+Kieran was an Executive Editor at Business Insider and its first Deputy Bureau Chief in the UK.He spearheaded BI’s work on the war in Ukraine and helped lead its breaking-news effort.He joined Business Insider in 2017, when it had no general-news desk in London, and built that team to more than a dozen people.He helped oversee coverage spanning politics, defense, business, science, health, entertainment, royalty, and lifestyle.In his time at BI, the UK news team won a Drum Award for its Ukraine reporting. Its work was twice shortlisted twice in the British Journalism Awards and highly commended once.He occasionally broke ranks to blog about Latin.Before Business Insider he worked for Dow Jones, MailOnline, The Sun, and The Independent.Kieran graduated from the University of Cambridge with a degree in English. He speaks some Russian and less French.He is on X with the handle @kj_corcoran.Notable work from his teams includes:The Unyielding City: How Ukraine lost Bakhmut and Russia won a hollow victoryIran will pay for gender-transition surgery, but it comes at a cost — your dignityA bright, talented Ukrainian journalist signed up to help Fox News cover the war. Two months later she was dead.Salt Bae's former employees describe tip theft, discrimination, and polyester uniforms‘I feel conned into keeping this baby’How an entire nation embraced toxic bleach as a COVID-19 miracle cureA Saudi princess, silencedInside London's derelict 'Billionaires Row' — a mile-long street of mystery, murder, and tax avoidance

merge-output/staging/029/index.json

@@ -0,0 +1,16 @@
+[
+  {
+    "case": 29,
+    "n": 1,
+    "field": "url",
+    "url": "https://www.businessinsider.com/bitcoin-raid-moulsford-transfer-failed-thieves-got-nothing-2018-2",
+    "host": "businessinsider.com",
+    "fetched_at": "2026-09-05T12:56:08+00:00",
+    "verdict": "FETCHED",
+    "method": "raw",
+    "http": 200,
+    "chars": 4916,
+    "sha256": "721229ffa8baa3fa1fe2e5aa9700649cc8d20ec4b8c0752267934f363986507a",
+    "final_url": null
+  }
+]