CLDSRV-955: Cache node_modules instead of yarn download cache

[tcarmet]

Speeds up CI by caching the installed dependency tree between runs instead of only the package-manager download cache. Because several dependencies compile TypeScript at install time, previous runs re-cloned, recompiled and relinked them on every job despite a "cache hit"; now a warm cache skips that work entirely and jobs reuse the prior install.

Measured impact (warm run vs a development/9.3 baseline)

Job	dependency setup before	after (warm)	job wall time
lint	61s	9s	116s → 49s
unit-tests	54s	10s	114s → 64s
file-ft-tests	84s	41s	750s → 722s

• ~43–52s of dependency setup saved per job, across ~15 jobs (4 inline + ~11 functional via the setup-ci composite action).
• Jobs run in parallel, so end-to-end wall time drops modestly (critical-path bound, ~30–40s), but total CI compute falls ~10 min per run and the short feedback jobs (lint, unit) are >2× faster.
• Cache key is ${{ runner.os }}-node-modules-${{ hashFiles('yarn.lock') }}; a lockfile bump invalidates it and the next run repopulates.

See the pinned comparison comment for full details.

[bert-e]

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[bert-e]

Incorrect fix version

The Fix Version/s in issue CLDSRV-955 contains:

• None

Considering where you are trying to merge, I ignored possible hotfix versions and I expected to find:

• 9.3.14

• 9.4.0

Please check the Fix Version/s of CLDSRV-955, or the target
branch of this pull request.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
8489	1	8488	0

View the top 2 failed test(s) by shortest run time

should log correct objectGetAttributes operation with all required fields::Server Access Logs - File Output With v4 signature should log correct objectGetAttributes operation with all required fields

Stack Traces | 0.033s run time

Expected 3 log entries, got 4

4 !== 3

should log correct bucketDeletePolicy operation with all required fields::Server Access Logs - File Output With default signature should log correct bucketDeletePolicy operation with all required fields

Stack Traces | 0.038s run time

Expected 3 log entries, got 4

4 !== 3

View the full list of 1 ❄️ flaky test(s)

"after each" hook for "should create a bunch of objects and their versions"::put and head object with versioning With v4 signature "after each" hook for "should create a bunch of objects and their versions"

Flake rate in main: 100.00% (Passed 0 times, Failed 5 times)

Stack Traces | 1.05s run time

The bucket you tried to delete is not empty.

To view more test analytics, go to the Test Analytics Dashboard
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[bert-e]

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