feat(names): gate aggressive correction to confirmed participants (speaker-turn context)

[silverstein]

Summary

Strengthens post-pass name correction (minutes-25x3.4) with speaker-turn context: the aggressive relaxed tier (name-position, different-first-letter / short token) now fires only when the matched name is a confirmed meeting participant , an attendee or a High-confidence attributed speaker from the speaker_map. The conservative tier (accent restoration / same-first-letter) still applies to any pool name.

This is the "stronger signal" the adversarial review recommended for the aggressive tier. It reduces the Brett→Geert collateral: aggressive corrections only fire toward people confirmed present in the meeting, never toward a name that is merely in the vocabulary/graph. The guest-near-participant case remains inherent (no text-only signal distinguishes a misheard participant from a real guest), so the feature stays off by default; default-on awaits a real-audio evaluation.

Changes

• name_correction.rs: PoolEntry.is_participant; the relaxed tier requires it. Restructured the candidate test to relaxed OR conservative (so a same-first-letter correction in a name-position is no longer blocked when the name is not a participant , a bug I caught while building this). New correct_names_with_participants; the 2-arg correct_names (all pool names treated as participants) is kept for tests and the eval harness.
• pipeline.rs: both finalize paths pass participants = attendees + High-confidence speaker_map names.
• config.rs: documented the participant gate and that default-on awaits a real-audio eval.

Verification

• Harness 6/6 recovered, 0 false corrections (unchanged: the 2-arg wrapper treats all pool names as participants).
• 22 matcher unit tests, including relaxed_tier_requires_a_confirmed_participant (bert→Geert suppressed when Geert is not a participant, fires when it is) and conservative_tier_does_not_require_participant (merci jacque → Jacques still works for a non-participant).
• 833 core tests; clippy -D warnings clean; fmt clean; CLI builds.

Branched off current main (includes the merged #364 and the contributor Windows fixes #357/#359/#361).

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Project	Deployment	Actions	Updated (UTC)
useminutes.app	Ready	Preview, Comment	Jun 25, 2026 8:15pm