[Fix] PR review notifications offer fixes for handled feedback

[roomote-roomote]

​Opened on behalf of @daniel-lxs. View the task or mention @roomote-roomote for follow-up asks.

Depends on #1264. This is the final PR in the review-notification stack.

What changed

• Preserve bounded, untrusted review bodies, provider comment IDs, reply relationships, and stable bot identity.
• Treat edited top-level review comments as distinct content revisions while exact webhook replays remain deduplicated.
• Filter resolved/outdated inline events and submitted reviews for an older PR head before helper triage.
• Separate notification value from actionability.
• Permit an automated-review action offer only when live provider state proves an open matching thread, failed CI, or merge conflict.
• Preserve deterministic fallback offers for human requested changes and live failures when helper output is incomplete.

Why

Discarding actual feedback and per-comment live state makes handled and actionable review activity look alike. A model-only decision can therefore offer work that no longer exists or miss work that provably does.

Proof

The local matrix covers edited content, bounded/untrusted prompt data, resolved threads, outdated threads, open matching threads, stale-head reviews, clean automated summaries, requested changes, failed CI, and conflicts. Resolved/outdated/stale events are removed before inference. Automated summary text alone cannot create an action offer. The stacked head passes 259 focused tests, repository-wide oxlint, 27-package fast typecheck, and knip.

[roomote-community]

No code issues found. See task

• packages/sdk/src/server/lib/task-runs/pr-review-notification-delivery.ts:577 Clean No code issues found. self-reviews can still receive a resolve offer.
• apps/api/src/handlers/github/notifyPrReviewActivity.ts:39 Review-body aggregation is unbounded and can exceed the triage model's input limit.
• packages/sdk/src/server/lib/pull-requests/source-control-pull-request-reads.ts:1071 The open-thread action signal is incomplete when a PR has more than 100 review threads or a thread has more than 50 comments.
• apps/api/src/handlers/github/notifyPrReviewActivity.ts:100 Edited comments without updated_at reuse the creation-time deduplication key, so later edits can be dropped.
• apps/api/src/handlers/github/notifyPrReviewActivity.ts:58 Timestamp-less summary lifecycle events use per-delivery revisions, preventing terminal summaries from closing their open review cycle.
• packages/sdk/src/server/lib/task-runs/pr-review-notification-delivery.ts:904 Resolved or outdated feedback from a submitted changes_requested review still forces a resolve offer.

_{Reviewed ba11890}