Sync READMEs and manuals to current script headers

Fix discrepancies found by auditing docs against headers:
- stability_watchdog.sh: wrong variable name (STRIKES → STRIKE_LIMIT) and wrong default (2hr → 12hr) in header
- Watchdogs manual: REBOOT_WINDOW_HRS example value was 2, should be 12
- Transcodes README: transcode_cleanup/manager table said "Every 3 min", should be "Every 7 minutes"
- Tools manual: fallback_state_reset.sh still marked "not yet built" — rewrite section to reflect current script
- Tools manual: claude_startup --setup flag doesn't exist; modes were inverted — fix and add --launch
- Tools README + manual: add docker_prune_images.sh (existed but undocumented)
- Tools manual: add play_state_sync.sh --full to flag reference
- Orchestrators README: arrs_failed_stalled_recovery runs via intermediate_sync (every 4hr), not standalone every 6hr
- Plugin README: add build.sh to scripts table
- Partnership README + manual: add partnership_transfer.sh and onboard_cancel.sh to script tables and flag reference

Transcodes/README-Transcoding.md

@@ -132,8 +132,8 @@ Both are called by `transcode_management.sh` in the correct order.
 | Script | Role | When It Runs |
 |--------|------|-------------|
 | `ramdisk_setup.sh` | Create tmpfs, SSD fallback dir, symlink, transcoding-temp | At array start (via array_started.sh) |
-| `transcode_cleanup.sh` | Remove stale files, check for flip-back opportunity | Every 3 min via transcode_management.sh — runs first |
-| `transcode_manager.sh` | Check usage, flip symlink, safety checks, session display, daily log | Every 3 min via transcode_management.sh — runs second |
+| `transcode_cleanup.sh` | Remove stale files, check for flip-back opportunity | Every 7 minutes via transcode_management.sh — runs first |
+| `transcode_manager.sh` | Check usage, flip symlink, safety checks, session display, daily log | Every 7 minutes via transcode_management.sh — runs second |
 
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