Auto-review eligibility filters (skip drafts, bot authors, WIP titles, base-branch scope, auto-pause)

[JSONbored]

Phase 1 — Review output, noise & trust

Context

Every opened/synchronized PR currently enters the review path regardless of author or state, spending review budget and adding comment noise on drafts, bot PRs (e.g. dependency-bump bots), and work-in-progress. Eligibility is only partially controllable today (includeMaintainerAuthors, the contributor blacklist).

Goal

Add per-repo eligibility filters so operators skip reviews that aren't worth the cost or noise.

Requirements

• New .gittensory.yml knobs under review.auto_review: skip_drafts (bool), ignore_authors (glob list, e.g. *[bot]), ignore_title_keywords (list, e.g. WIP/DRAFT), base_branches (glob list; default = default branch only), auto_pause_after_reviewed_commits (int, 0 = off).
• Wire via FocusManifestReviewConfig (src/signals/focus-manifest.ts): field + parseReviewConfig + reviewConfigToJson + every EMPTY-config literal; evaluate at the PR review entry point (maybePublishPrPublicSurface).
• Deterministic; no AI. Default unset ⇒ byte-identical (all PRs reviewed as today).

Deliverables

• Config fields + parser + tests (unit + focus-manifest coverage).
• Eligibility evaluation at the review entry point; a skipped PR posts a quiet "review skipped (reason)" status, never a gate failure.
• Manifest reference docs.

Expected outcome

• Operators cut review runtime/neuron spend and comment noise on bots/drafts/WIP; measurable drop in reviews run on ineligible PRs.

Effort

S each — split into ~4 tiny PRs (one or two knobs per PR).

[linear-code]

JSO-2034