test(cache): run the remote cache e2e tests against the public cache service

`remote-cache-server` now runs the Worker from `packages/remote-cache`
in workerd through Miniflare instead of the Node test backend, so the
e2e tests exercise `vp run` against the real service.

The wrapper proxies requests to the service. It signs an upload token
for each store with a key the service fetches in place of GitHub's. It
numbers the service's random blob IDs in upload order for the request
log, and copies each blob to `remote-cache/blobs/<number>`, storing a
changed copy on the next run so tests can still corrupt an archive.

Miniflare exits on SIGINT, so the wrapper drops its listener to keep
leaving Ctrl-C to the command.

The only snapshot change is the request log for a fetch miss, which the
service answers with a 404. The cases are skipped on musl because
workerd's prebuilt binaries require glibc.

The `remote_cache_backend` fixture only tested the old backend, and the
service has its own protocol tests, so it's removed along with
`cbor-http` and its EDN formatting.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: wan9chi

.github/workflows/ci.yml

@@ -177,9 +177,7 @@ jobs:
         run: pnpm --filter vite-task-tools exec playwright install-deps chromium
 
       - name: Run ignored tests
-        run: |
-          pnpm --filter vite-task-tools test
-          ${{ matrix.cargo_cmd }} test --target ${{ matrix.build_target }} -- --ignored
+        run: ${{ matrix.cargo_cmd }} test --target ${{ matrix.build_target }} -- --ignored
 
   # Windows tests are cross-compiled on a fast Linux runner with cargo-xwin
   # (clang-cl + lld-link against the xwin-downloaded MSVC CRT/Windows SDK)
@@ -312,9 +310,7 @@ jobs:
 
       - name: Run ignored tests
         if: matrix.mode == 'ignored'
-        run: |
-          pnpm --filter vite-task-tools test
-          cargo-nextest nextest run --archive-file windows-tests.tar.zst --workspace-remap . --run-ignored ignored-only
+        run: cargo-nextest nextest run --archive-file windows-tests.tar.zst --workspace-remap . --run-ignored ignored-only
 
   test-musl:
     needs: detect-changes
@@ -368,9 +364,7 @@ jobs:
       - uses: oxc-project/setup-node@f46a72f95efdc55273fcd042d61c84e723b2892c # v1.4.1
 
       - name: Run ignored tests
-        run: |
-          pnpm --filter vite-task-tools test
-          cargo test -- --ignored
+        run: cargo test -- --ignored
 
   fmt:
     name: Format and Check Deps

crates/vt_bin/tests/e2e_snapshots/fixtures/remote_cache/snapshots.toml

@@ -1,12 +1,14 @@
 # Cases that use the remote cache backend are ignored because it runs on
 # Node.js. Windows is skipped because the PTY launcher cannot execute pnpm
-# command shims. Whether an upload to the backend is still running when the
-# tasks finish depends on timing, so steps that upload hide the message about
-# pending uploads. The cases that test it stall the uploads instead, with
-# stalled-remote-cache in front of the backend.
+# command shims. musl is skipped because the backend runs the public cache
+# service in workerd, whose prebuilt binaries require glibc. Whether an upload
+# to the backend is still running when the tasks finish depends on timing, so
+# steps that upload hide the message about pending uploads. The cases that test
+# it stall the uploads instead, with stalled-remote-cache in front of the
+# backend.
 [[e2e]]
 name = "read_write"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -39,7 +41,7 @@ steps = [
 
 [[e2e]]
 name = "read"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -73,7 +75,7 @@ steps = [
 
 [[e2e]]
 name = "restore"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -145,7 +147,7 @@ steps = [
 
 [[e2e]]
 name = "local_and_remote_hits"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -188,7 +190,7 @@ steps = [
 
 [[e2e]]
 name = "fallback"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -228,7 +230,7 @@ steps = [
 
 [[e2e]]
 name = "corrupt_archive"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -280,7 +282,7 @@ steps = [
 
 [[e2e]]
 name = "restore_failure"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -349,7 +351,7 @@ steps = [
 
 [[e2e]]
 name = "pending_uploads"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -562,7 +564,7 @@ steps = [
 
 [[e2e]]
 name = "ctrl_c_during_upload"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -597,7 +599,7 @@ steps = [
 
 [[e2e]]
 name = "fast_fail_during_upload"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [
@@ -622,7 +624,7 @@ steps = [
 
 [[e2e]]
 name = "hide_pending_uploads"
-cfg = "not(windows)"
+cfg = 'not(any(windows, target_env = "musl"))'
 ignore = true
 steps = [
   { argv = [