Step 1 of rpkgs/bincraft#211: pass the metadata database explicitly so bincraft can drop its implicit production defaults.
## Changes
- Pass `metadata_db_*` explicitly to every per-minor `upload_package_index()` call in `reindex.yaml`, `process-updates.yaml`, `weekly-rebuild-reindex.yaml`, `build-all-versions.yaml` and `prune-stale-flat-binaries.yaml`.
- Replace `|| true` in those per-minor loops with a list of failed minors: every minor is still attempted, then the step exits 1 naming the ones that failed.
- Give the "Upload package indexes" step of `build-all-versions.yaml` the `PGPASS` secret. It never had it, so its per-minor reindexes always aborted and `|| true` hid that.
- Run the CDN purge in `process-updates.yaml` and `prune-stale-flat-binaries.yaml` even when a reindex failed, as `reindex.yaml` and `weekly-rebuild-reindex.yaml` already do, because the generic index was still replaced.
- `local/repair-built-stamp.R` passes the database too, and fails once all minors are tried instead of only printing the error.
The generic (non-per-minor) calls are unchanged: they never read the database.
## Behaviour change
A per-minor reindex that fails now turns the pipeline red instead of passing silently.
Expect build-all-versions runs to start reindexing per-minor slots for real, since they now have the password.
## Ordering
Merge this before rpkgs/bincraft's companion PR is released: `local/install-bincraft.R` installs the latest bincraft tag, and the explicit arguments work with both the current and the next release.
Reviewed-on: #234
## Summary
Builds R-minor-sensitive CRAN packages once per installed R minor version (into per-minor S3 slots `…/contrib/<x.y>/`) and everything else once into the generic slot, driven by bincraft 4.2.0's ABI classifier. Both the full and iterative pipelines are covered.
## What's in here
**Detection / precompute**
- `local/r-minor-helpers.R` — pure `classify_from_metadata()` (NeedsCompilation / risky `LinkingTo`) + `parse_build_args()`, with unit tests.
- `local/packages-to-build.R` — adds a per-package `r_minor_sensitive` flag: cheap CRAN-metadata rules first, source download + `bincraft::needs_per_minor_recompile()` only for the ambiguous compiled subset (fail-safe to sensitive). Classified once per package, applied to all versions.
**Full build**
- `local/build-all.R` — passes the per-row `is_r_minor_sensitive` flag; new `--sensitive-only` mode builds just the risky subset.
- `.crow/build-all-versions-{amd64,arm64}.yaml` — install-deps persists the sensitive subset; build step runs a sensitive-only pass under each non-primary `/opt/R/*` minor; new step uploads the generic index plus a per-minor index for each minor.
**Iterative build**
- All 14 `.crow/process-updates-*.yaml` — primary pass uses `r_minor_detection = 'classifier'`; a sensitive-only multi-R pass builds risky updates under each other minor; per-minor index upload added.
**Tooling / housekeeping**
- Pins bincraft `v4.1.1` → `v4.2.0` across all workflows; removes the superseded standalone `build-r-minor-sensitive-packages.yaml`.
- Adds prek/pre-commit hooks (prettier, markdownlint, editorconfig-checker, yamllint, air) and applies them repo-wide; excludes the verbatim GPL `LICENSE.md` and auxiliary shell scripts.
- Design + implementation docs under `docs/superpowers/`.
## Requires before merge
- A `v4.2.0` git tag must be pushed on the bincraft repo (codefloe.com/rpkgs/bincraft) — the workflow install steps pin `@v4.2.0`. The full-build install-deps clones `main`, so it is unaffected.
Reviewed-on: #84
