chore(ci): point sccache cache at olivedev MinIO instance (#653)

The eyevinnlab rustcache MinIO instance lost its data and bucket during the
hyperscaler migration. Move the self-hosted sccache S3 backend to a fresh
minio-minio instance in the olivedev tenant.

- Bucket: strom -> sccache
- Endpoint: eyevinnlab-rustcache…auto.prod.osaas.io
            -> olivedev-rustcache…auto.prod-se.osaas.io
- Region / SSL unchanged

Updated in all four locations: ci.yml and release.yml env blocks, and both
Dockerfile builder-stage ENV blocks. Credentials live in the repo secrets
SCCACHE_S3_ACCESS_KEY_ID / SCCACHE_S3_SECRET_ACCESS_KEY and must be rotated to
the new instance's scoped service account before this lands.

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: srperens

.github/workflows/ci.yml

@@ -17,9 +17,9 @@ env:
   # ceiling with the docker buildkit blobs. The same backend is reused by the
   # release workflow and the Dockerfile builder, where rust-cache cannot reach.
   # Requires repo secrets SCCACHE_S3_ACCESS_KEY_ID / SCCACHE_S3_SECRET_ACCESS_KEY
-  # (a service account scoped to the strom bucket, no admin).
-  SCCACHE_BUCKET: strom
-  SCCACHE_ENDPOINT: https://eyevinnlab-rustcache.minio-minio.auto.prod.osaas.io
+  # (a service account scoped to the sccache bucket, no admin).
+  SCCACHE_BUCKET: sccache
+  SCCACHE_ENDPOINT: https://olivedev-rustcache.minio-minio.auto.prod-se.osaas.io
   SCCACHE_REGION: us-east-1
   SCCACHE_S3_USE_SSL: "true"
   AWS_ACCESS_KEY_ID: ${{ secrets.SCCACHE_S3_ACCESS_KEY_ID }}

.github/workflows/release.yml

@@ -17,8 +17,8 @@ env:
   # NO Swatinem/rust-cache steps: saving ~5-7 GB of one-shot caches per tag
   # only evicted the CI workflow's hot caches. sccache is the persistent cache.
   # Requires repo secrets SCCACHE_S3_ACCESS_KEY_ID / SCCACHE_S3_SECRET_ACCESS_KEY.
-  SCCACHE_BUCKET: strom
-  SCCACHE_ENDPOINT: https://eyevinnlab-rustcache.minio-minio.auto.prod.osaas.io
+  SCCACHE_BUCKET: sccache
+  SCCACHE_ENDPOINT: https://olivedev-rustcache.minio-minio.auto.prod-se.osaas.io
   SCCACHE_REGION: us-east-1
   SCCACHE_S3_USE_SSL: "true"
   AWS_ACCESS_KEY_ID: ${{ secrets.SCCACHE_S3_ACCESS_KEY_ID }}

Dockerfile

@@ -36,8 +36,8 @@ RUN ARCH="$(uname -m)" && \
       | tar -xz -C /tmp && \
     install -m0755 "/tmp/sccache-v${SCCACHE_VERSION}-${ARCH}-unknown-linux-musl/sccache" /usr/local/bin/sccache && \
     rm -rf /tmp/sccache-*
-ENV SCCACHE_BUCKET=strom \
-    SCCACHE_ENDPOINT=https://eyevinnlab-rustcache.minio-minio.auto.prod.osaas.io \
+ENV SCCACHE_BUCKET=sccache \
+    SCCACHE_ENDPOINT=https://olivedev-rustcache.minio-minio.auto.prod-se.osaas.io \
     SCCACHE_REGION=us-east-1 \
     SCCACHE_S3_USE_SSL=true
 
@@ -91,8 +91,8 @@ RUN ARCH="$(uname -m)" && \
       | tar -xz -C /tmp && \
     install -m0755 "/tmp/sccache-v${SCCACHE_VERSION}-${ARCH}-unknown-linux-musl/sccache" /usr/local/bin/sccache && \
     rm -rf /tmp/sccache-*
-ENV SCCACHE_BUCKET=strom \
-    SCCACHE_ENDPOINT=https://eyevinnlab-rustcache.minio-minio.auto.prod.osaas.io \
+ENV SCCACHE_BUCKET=sccache \
+    SCCACHE_ENDPOINT=https://olivedev-rustcache.minio-minio.auto.prod-se.osaas.io \
     SCCACHE_REGION=us-east-1 \
     SCCACHE_S3_USE_SSL=true