CI paths: TS Test — add internals/distcheck, exclude fragment/attestation dirs #848

Part of #834. Phase 1 (unanchored corrections — no dependency on any other slice).

What

Same two defects as the Python Test slice:

1. Missing internals/distcheck/**. ts-test.yml:244 runs dirsql-distcheck node, so this workflow consumes that package but a distcheck-only PR does not trigger it. Spec row 9.
2. Over-triggers on packages/ts/**, which pulls in changelog.d/, migrations.d/ and e2e-attestations/ (spec rows 14 and 15).

Exact change

.github/workflows/ts-test.yml — replace the on: block with:

on:
  push:
    branches: [main]
    paths:
      - 'packages/ts/**'
      - '!packages/ts/changelog.d/**'
      - '!packages/ts/migrations.d/**'
      - '!packages/ts/e2e-attestations/**'
      - 'packages/rust/**'
      - 'internals/distcheck/**'
      - 'Cargo.toml'
      - 'Cargo.lock'
      - '.github/workflows/ts-test.yml'
  pull_request:
    paths:
      - 'packages/ts/**'
      - '!packages/ts/changelog.d/**'
      - '!packages/ts/migrations.d/**'
      - '!packages/ts/e2e-attestations/**'
      - 'packages/rust/**'
      - 'internals/distcheck/**'
      - 'Cargo.toml'
      - 'Cargo.lock'
      - '.github/workflows/ts-test.yml'

Ordering matters — the ! exclusions must directly follow the packages/ts/** they narrow (last match wins).

packages/ts/** already covers napi/, package.json, tsconfig*.json and the pnpm lockfiles, so spec rows 7 and 19 need no extra entries here.

Do not add testing-conventions.toml — TS unit coverage moved into the reusable workflow (ts-test.yml:199).

Expected checks on this PR

Files touched: .github/workflows/ts-test.yml only.

MUST run

• TS Test

MUST NOT run

• Python Test, Rust Test, Plugins Test, Python Lint, Python Typecheck, TS Lint, TS Typecheck

May still run (not yet filtered)

• Conventions (all 8 lanes), Release Precheck, Release Config Check, Changelog Check

Optional probe for the two new behaviours, same recipe as the Python Test slice: a throwaway commit touching internals/distcheck/README.md (expect TS Test present), then one touching only packages/ts/e2e-attestations/ (expect TS Test absent). Drop before merging.

Acceptance

• The PR's check list matches the three groups above exactly
• Mergify Merge Protections green
• Merge, close this issue

Notes

• No changelog fragment, no e2e attestation. Not anchored in .mergify.yml.