ci: path-based skip and gate job in pr_checks

[nicktrn]

pr_checks runs the full matrix on every PR. #3609 touched only apps/webapp/app/routes/admin.tsx and still ran the 4-job CLI e2e matrix and 5-job sdk-compat suite.

Adds a changes job using dorny/paths-filter and gates each tier:

• webapp + e2e-webapp: apps/webapp/**, packages/**, internal-packages/**
• packages: packages/**
• internal: internal-packages/** + packages/** (cross-deps)
• e2e (cli-v3): packages/{cli-v3,build,core,schema-to-json}/**
• sdk-compat: packages/{trigger-sdk,core}/**

.configs/**, package.json, pnpm-lock.yaml, pnpm-workspace.yaml, turbo.json are also included in every filter since they affect the whole workspace.

Inlines the units reusable-workflow children so each can be gated independently (status check names also flatten from units / webapp / ... to webapp / ...). unit-tests.yml is unaffected - still used by publish.yml.

Adds an all-checks gate that always runs and short-circuits to success when every dependent is success-or-skipped. With this in place a single required status check (All PR Checks) is enough; before this, paths-ignore would have left required checks Pending on docs/changeset PRs (gh docs).

[changeset-bot]

⚠️ No Changeset found

Latest commit: d89ec19

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 714c6325-2185-480a-9383-61d2194681df

📥 Commits

Reviewing files that changed from the base of the PR and between 30bd18e and 5a11122.

📒 Files selected for processing (1)

• .github/workflows/pr_checks.yml

🚧 Files skipped from review as they are similar to previous changes (1)

• .github/workflows/pr_checks.yml

📜 Recent review details

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (30)

• GitHub Check: webapp / 🧪 Unit Tests: Webapp (7, 8)
• GitHub Check: internal / 🧪 Unit Tests: Internal (4, 8)
• GitHub Check: webapp / 🧪 Unit Tests: Webapp (8, 8)
• GitHub Check: webapp / 🧪 Unit Tests: Webapp (1, 8)
• GitHub Check: webapp / 🧪 Unit Tests: Webapp (6, 8)
• GitHub Check: webapp / 🧪 Unit Tests: Webapp (4, 8)
• GitHub Check: webapp / 🧪 Unit Tests: Webapp (5, 8)
• GitHub Check: webapp / 🧪 Unit Tests: Webapp (3, 8)
• GitHub Check: webapp / 🧪 Unit Tests: Webapp (2, 8)
• GitHub Check: internal / 🧪 Unit Tests: Internal (6, 8)
• GitHub Check: sdk-compat / Cloudflare Workers
• GitHub Check: internal / 🧪 Unit Tests: Internal (3, 8)
• GitHub Check: sdk-compat / Node.js 20.20 (ubuntu-latest)
• GitHub Check: internal / 🧪 Unit Tests: Internal (2, 8)
• GitHub Check: e2e / 🧪 CLI v3 tests (windows-latest - npm)
• GitHub Check: internal / 🧪 Unit Tests: Internal (8, 8)
• GitHub Check: sdk-compat / Deno Runtime
• GitHub Check: e2e / 🧪 CLI v3 tests (windows-latest - pnpm)
• GitHub Check: sdk-compat / Node.js 22.12 (ubuntu-latest)
• GitHub Check: e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)
• GitHub Check: internal / 🧪 Unit Tests: Internal (7, 8)
• GitHub Check: internal / 🧪 Unit Tests: Internal (5, 8)
• GitHub Check: e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)
• GitHub Check: internal / 🧪 Unit Tests: Internal (1, 8)
• GitHub Check: sdk-compat / Bun Runtime
• GitHub Check: packages / 🧪 Unit Tests: Packages (1, 1)
• GitHub Check: e2e-webapp / 🧪 E2E Tests: Webapp
• GitHub Check: typecheck / typecheck
• GitHub Check: Analyze (javascript-typescript)
• GitHub Check: Analyze (python)

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Walkthrough

This PR refactors .github/workflows/pr_checks.yml to implement path-filter-driven conditional job execution. The workflow now runs dorny/paths-filter to compute outputs for six distinct codepaths (code, webapp, packages, internal, cli, sdk), and each downstream CI job—including webapp tests, E2E, package tests, internal tests, CLI E2E, and SDK compatibility—conditionally executes based on those outputs. Permissions were expanded to include pull-requests: read, and a new all-checks aggregator job validates that no CI job failed or was cancelled, allowing the overall workflow to report success when checks pass or are skipped due to path filters.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: adding path-based filtering to skip jobs and a gating job in the PR checks workflow.
Description check	✅ Passed	The description is comprehensive and addresses the template structure with testing and changelog information, though some optional sections like Screenshots are not provided.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/pr-checks-gate-and-filters

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