ci: fix Codecov slug after repo rename (modules -> framework)

[tmgbedu]

Problem

The repo was renamed fastapi-startkit-modules -> fastapi-startkit-framework, but the CI upload slug and the README badge/link URLs still referenced the old name. Uploads and the badge therefore hit the wrong (empty) Codecov project, so the badge shows no data.

Changes

• .github/workflows/test.yml — codecov-action slug -> fastapi-startkit/fastapi-startkit-framework.
• readme.md — badge SVG URL + link target -> framework.
• fastapi_startkit/README.md — badge (line 3) + prose Codecov link -> framework.
• packages/fastapi-vite-plugin/package.json — repository/bugs URLs -> framework (also carried the old slug; fixed so VERIFY passes).
• codecov.yml (new, repo root) — minimal permissive config: project + patch status set to informational: true so coverage never fails PRs; defines the fastapi_startkit flag (paths fastapi_startkit/src/fastapi_startkit/, carryforward).

Verification

• grep -rn fastapi-startkit-modules . -> 0 matches.
• codecov.yml validated against https://codecov.io/validate -> Valid!

⚠️ Manual steps required (cannot be done from the repo)

1. Activate the Codecov project for fastapi-startkit/fastapi-startkit-framework in the Codecov dashboard.
2. Set the CODECOV_TOKEN secret for the renamed project in the repo's GitHub Actions secrets.

Note: the local git origin remote still points at the old ...-modules.git URL; GitHub auto-redirects so pushes work, but the remote could be updated separately.

[codecov]

Welcome to Codecov 🎉

Once you merge this PR into your default branch, you're all set! Codecov will compare coverage reports and display results in all future pull requests.

ℹ️ You can also turn on project coverage checks and project coverage reporting on Pull Request comment

Thanks for integrating Codecov - We've got you covered ☂️

[tmgbedu]

✅ Code Review: APPROVE

Reviewed full diff + ran all checks on task/codecov-slug-fix. (Formal --approve blocked by GitHub since the reviewer account authored the PR; recording verdict as a comment.)

Verification

1. grep -rn fastapi-startkit-modules . → 0 matches on PR branch ✔
2. test.yml: slug fastapi-startkit/fastapi-startkit-framework, flags: fastapi_startkit, files: fastapi_startkit/coverage.xml ✔
3. readme.md + fastapi_startkit/README.md: badge URLs and link targets updated ✔
4. codecov.yml (new): Codecov validator → Valid!; project+patch informational: true, require_changes: false → never fails PRs; fastapi_startkit flag defined ✔
5. fastapi-vite-plugin/package.json: repo/bugs URLs → framework ✔
6. Only 5 expected files changed, no unintended files ✔

Minor (non-blocking): flag paths: fastapi_startkit/src/fastapi_startkit/ must match the paths in coverage.xml; being informational, a mismatch only weakens per-flag filtering, never fails CI. Sanity-check on first upload.

Config-only (no code/SQL/ORM) → no tests required. Reminder: the 2 manual steps (activate Codecov project + set CODECOV_TOKEN) are needed for the badge to populate.