Consolidate mentor meeting notes from the Research Log Google Slides deck into docs/mentor_updates/

Summary

Consolidate the meeting notes accumulated in the "Research Log" Google Slides deck (presentation ID 1V0O4CQ-xiC3Ulll0vXcp8H-I3Cez3-4Eqd5uwI9pEEk) into the repo so they stop living only in slides.

Scope

1. Pull all meeting-note slides from the deck (Google Workspace MCP: get_google_slides_content + speaker notes).
2. Write dated, structured notes into docs/mentor_updates/ (one file per meeting date), preserving provenance there — docs/mentor_updates/ is the one place person/meeting attribution is allowed.
3. Extract every action item / experiment idea embedded in the notes; cross-check each against the existing proposed queue (task.py list-by-status --status proposed) and file genuinely new ones as proposed tasks (capture only, no execution), stating facts without attribution per the project register rule.
4. End with a short index: meeting date → notes file → tasks filed/matched.

Provenance

Originating prompt (user, PM session, 2026-06-12): "add task to consolidate meeting notes from Dan (from google slides)"

Outcome (2026-06-12)

All four scope items completed, user-driven one-by-one (planner skipped at user request):

1. Notes pulled: full 39-slide sweep incl. all speaker notes; deck holds two meetings — the undated top section identified as the Jun 4 meeting (its next-steps match Jun 11's "Todos From Last Week").
2. Dated notes written: docs/mentor_updates/2026-06-04.md (4dd85256d) + docs/mentor_updates/2026-06-11.md (5e523fb19, verbatim speaker notes with slide context). The Jun-4 in-slide discussion notes were deleted from the deck at user request (surgical Slides-API deleteText).
3. Cross-check + filing (audited): filed #617 (WildChat categories), #621 (rank-1 LoRA A/B-vector test — running autonomously), #622 (negatives-to-failure sweep), #619 (human: LoRA placement); #618 archived as duplicate of #612 arm C (user catch); remaining items matched to existing issues per the index + audit-correction markers in events.jsonl. Two personal todos (send sycophancy-data + WildChat/ICL data links) captured to the personal inbox.
4. Index: in events.jsonl (epm:progress index marker + two correction markers).

Side products: six workflow fixes merged to main (mentor-slides qualitative-examples requirement + data-quality backup-slide family + four follow-on repairs; the on-policy-first training-completions rule + general design lessons encoded in planner/critic/rules); epm:followup-scope (onpolicy-testbed-v2) queued on #545.