Migrate the GuestStream 046/047/053/055/058 batches (56 files)

[docxology]

• Series: GuestStream
• Files: 56
• Estimated time: ~120 minutes
• Labels: good-first-issue, i16-translations

Five more GuestStream items, each a sole-part title match: #046.1 Denise Holt "Active Inference AI & the Spatial Web" → dUW8cD8XUec; #047.1 Bellini-Leite "Predicting & Reflecting" → O6adLcDhOYU; #053.1 Tolchinsky "A case for chaos theory" → _GHJO_bnyrY; #055.1 Pang & Fornito "Geometric constraints" → a4DC1YCVpsU; #058.1 "Working with Gerald Edelman" → Sz7ZP2N6DuE.

Scope (from the triage doc, Part A):

• Item GuestStream/GuestStream_046
  • 12 files, stem gs046.1 ~ Denise Holt, Active Inference AI & the Spatial Web → target translations/dUW8cD8XUec.<bcp47>.srt
• Item GuestStream/GuestStream_047
  • 11 files, stem ActInf GuestStream 047.1 Predicting, Reflecting Framework for Dual Process Theory, S. Bellini-Leite → target translations/O6adLcDhOYU.<bcp47>.srt
• Item GuestStream/GuestStream_053
  • 11 files, stem ActInf GuestStream 053.1 ~ Tolchinsky et al 2023 A case for chaos theory → target translations/_GHJO_bnyrY.<bcp47>.srt
• Item GuestStream/GuestStream_055
  • 11 files, stem gs055 1 ~ James Pang, Alex Fornito Geometric constraints → target translations/a4DC1YCVpsU.<bcp47>.srt
• Item GuestStream/GuestStream_058
  • 11 files, stem gs058-1 Working with Gerald Edelman → target translations/Sz7ZP2N6DuE.<bcp47>.srt

Read first: docs/volunteer-transcript-tasks.md —
sections "The 30-minute task (per file)" and "Exact command pattern".

Steps, per file:

1. Verify the guessed video_id in the item's metadata.json + a YouTube spot-check of the part.
2. Confirm the language by opening the .srt (normalize legacy codes per the migration map).
3. Move with the two-step git mv into translations/<video_id>.<bcp47>.srt.
4. Append the original repo-relative path to the destination item's metadata.json previous_paths.
5. One path-scoped commit per item: translations(<series>): migrate <N> legacy files (I16 triage).

Acceptance criteria:

• every listed file moved (or deleted, if byte-identical to an already-migrated target) with previous_paths recorded
• no listed file remains in the item's Translations/ folder; empty Translations/ and translations_tmp/ removed
• spot-checked target files open as valid subtitles and match the verified part/language