ci: add weekday Slack digest of PRs marked ready for review

[devin-ai-integration]

Summary

New scheduled workflow .github/workflows/slack-ready-for-review-digest.yml that posts one digest to #dev-apis-prs (C0BHDAPNPCY) at 7:00 AM Pacific, Mon–Fri, listing every PR marked ready for review since the previous digest. It does not replace the existing per-PR slack-pr-notification.yml; it reuses that workflow's Slack action (same SHA pin), channel, and jq escaping conventions, but deliberately omits the <!subteam^…> mention so the daily digest stays quiet.

Window semantics. Rather than assuming a fixed 24h/72h lookback, the window starts at the created_at of the last successful scheduled run of this workflow, so a skipped or failed run is absorbed by the next one instead of dropping PRs:

previous_run=$(gh api ".../workflows/slack-ready-for-review-digest.yml/runs?event=schedule&status=success&per_page=1" --jq '.workflow_runs[0].created_at')
# no history yet (first run) -> Monday looks back 72h, other weekdays 24h
# workflow_dispatch lookback_hours overrides both

The cron carries a timezone: "America/Los_Angeles" key, so Pacific 7 AM holds across DST without the two-cron PST/PDT workaround.

"Marked ready for review" is not a searchable field, so selection is two-phase: gh pr list --search "updated:>=<window date>" narrows the candidate set, then each candidate's issues/<n>/timeline supplies the timestamp of its most recent ready_for_review event (falling back to createdAt for PRs opened straight out of draft). Comparison is on epoch seconds, not ISO strings, since the API returns …Z while date --iso-8601 emits …+00:00.

Each digest line renders #N — title, author, +adds -dels across N file(s), and reviewers — the union of requested reviewers (teams included) and people who actually submitted a review, with bots stripped via a [bot]-suffix rule plus a small extensible $bots denylist for apps like coderabbitai whose login lacks the suffix. reviewers: unassigned is the signal worth scanning for. Merged/closed PRs stay in the digest but carry a state marker so finished work is skippable. When nothing qualifies, the Slack step is skipped rather than posting an empty digest.

workflow_dispatch takes lookback_hours and dry_run for testing.

Verification

• actionlint (v1.7.12), YAML parse, and bash -n on all run: blocks pass.
• The collection and payload logic was run locally against this repo with a 30-day window: 24 PRs, with correct diff stats, human reviewers, and state markers. Boundary-checked by moving the window one second either side of a known PR's ready-for-review timestamp (24 vs. 23 results).
• Not yet exercised as a real Actions run — the first scheduled run (or a dry_run=true dispatch after merge) is the remaining check.

Link to Devin session: https://app.devin.ai/sessions/8690034cbdc9443ca2b1432dba20b892

[devin-ai-integration]

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[github-actions]

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Testing This CDK Version

You can test this version of the CDK using the following:

# Run the CLI from this branch:
uvx 'git+https://github.com/airbytehq/airbyte-python-cdk.git@chore/slack-ready-for-review-digest#egg=airbyte-python-cdk[dev]' --help

# Update a connector to use the CDK from this branch ref:
cd airbyte-integrations/connectors/source-example
poe use-cdk-branch chore/slack-ready-for-review-digest

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[github-actions]

PyTest Results (Fast)

4 181 tests  ±0   4 169 ✅ ±0   8m 4s ⏱️ -3s
    1 suites ±0      12 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit b121f5a. ± Comparison against base commit 4758b15.