fix(ci): pass the metadata DB to per-minor reindexes and fail on errors

- Pass `metadata_db_*` explicitly to every per-minor `upload_package_index()` call, so bincraft can drop its implicit production defaults (rpkgs/bincraft#211).
- Replace `|| true` in the per-minor reindex loops with a failure list, so every minor is still attempted but a failed reindex fails the step.
- Give the "Upload package indexes" step of build-all-versions the `PGPASS` secret, without which its per-minor reindexes always aborted.
- Run the CDN purge in process-updates and prune-stale-flat-binaries even when a reindex failed, as reindex.yaml already does.
- Fail local/repair-built-stamp.R when a per-minor reindex fails instead of only printing the error.

.crow/reindex.yaml

@@ -162,10 +162,15 @@ steps:
       # The codename is detected from the image's /etc/os-release.
       - /opt/R/$R_VERSION/bin/R -q -e 'library(bincraft); upload_package_index(s3_endpoint = "https://s3.eu-central-003.backblazeb2.com", s3_region = "eu-central-003", s3_bucket = "devxy-rpkgs-binaries", s3_access_key_id = Sys.getenv("B2_S3_ACCESS_KEY"), s3_secret_access_key = Sys.getenv("B2_S3_SECRET_KEY"))'
       - |
+        FAILED_MINORS=""
         for RBIN in /opt/R/[0-9]*/bin/R; do
           RMINOR=$(basename "$(dirname "$(dirname "$RBIN")")" | cut -d. -f1-2)
-          /opt/R/$R_VERSION/bin/R -q -e "library(bincraft); upload_package_index(r_minor = '$RMINOR', s3_endpoint = 'https://s3.eu-central-003.backblazeb2.com', s3_region = 'eu-central-003', s3_bucket = 'devxy-rpkgs-binaries', s3_access_key_id = Sys.getenv('B2_S3_ACCESS_KEY'), s3_secret_access_key = Sys.getenv('B2_S3_SECRET_KEY'))" || true
+          /opt/R/$R_VERSION/bin/R -q -e "library(bincraft); upload_package_index(r_minor = '$RMINOR', s3_endpoint = 'https://s3.eu-central-003.backblazeb2.com', s3_region = 'eu-central-003', s3_bucket = 'devxy-rpkgs-binaries', s3_access_key_id = Sys.getenv('B2_S3_ACCESS_KEY'), s3_secret_access_key = Sys.getenv('B2_S3_SECRET_KEY'), metadata_db_host = 'r-binaries.devxy.io', metadata_db_name = 'build_metadata', metadata_db_port = 15432L, metadata_db_user = 'rpkgs', metadata_db_password = Sys.getenv('PGPASS'), metadata_db_sslmode = 'require')" || FAILED_MINORS="$FAILED_MINORS $RMINOR"
         done
+        if [ -n "$FAILED_MINORS" ]; then
+          echo "Could not republish the per-minor index for:$FAILED_MINORS" >&2
+          exit 1
+        fi
 
   - name: Purge CDN cache
     image: reg.devxy.io/docker.io/library/alpine:3.24