[DP-19090] Migrate Windows CI jobs from Windows 2019 to Windows 2025

[Corey Christous (cchristous)]

Change Description

Migrates the two Windows pool references in this repo from s1-prod-windows (Windows Server 2019) to s1-windows-2025-amd64-4 (Windows Server 2025):

• .semaphore/semaphore.yml — the Windows x64 Stable: Tests block (runs on PR pushes; gated only by the release-marker skip: clause that does not apply to this change).
• .semaphore/playwright-e2e.yml — the parameterized Windows x64: Playwright E2E Tests block (manual / scheduled task pipeline).

Why this is the right change:

• Windows Server 2019 is approaching end of mainstream support; standardizing on Windows Server 2025 gets us off an aging OS image and onto the supported baseline.
• The s1-windows-2025-amd64-4 pool is already provisioned and was first exercised in the semaphore-test canary.
• Org-wide rollout announcement: https://confluent.slack.com/archives/C038ZJ00P/p1771984127572579

Why this is safe:

• Both changes touch only agent.machine.type; no commands, prologue, dependencies, or job structure are modified.
• The Windows blocks use npm, npx, choco, gh, and make — all toolchain-portable and not pinned to a specific Windows SDK version.
• Reverting either single-line change immediately restores the previous pool if any regression is observed.

Testing

• The Windows x64 Stable: Tests block in semaphore.yml will run on this PR (the skip: only fires on release.svg / .versions/next.txt changes, neither of which are touched here). Look for that block to pass on the new agent.
• playwright-e2e.yml is parameterized and not triggered on PR; it will be exercised the next time the manual/scheduled task runs after merge.
• No effect on Linux x64 / Linux ARM64 / macOS blocks.

[Copilot]

Pull request overview

Migrates the two Windows Semaphore CI agent pool references from the aging s1-prod-windows (Windows Server 2019) to s1-windows-2025-amd64-4 (Windows Server 2025), aligning with the org-wide rollout to a supported baseline OS image.

Changes:

• Update Windows stable test block agent type in .semaphore/semaphore.yml.
• Update Windows Playwright E2E block agent type in .semaphore/playwright-e2e.yml.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
.semaphore/semaphore.yml	Switches PR-gated Windows x64 Stable Tests block to the Windows Server 2025 pool.
.semaphore/playwright-e2e.yml	Switches parameterized/scheduled Windows Playwright E2E block to the Windows Server 2025 pool.

[sonarqube-confluent]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[sonarqube-confluent]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[Corey Christous (cchristous)]

🤖 Review Hub assignments

@dtx → Dave Shoup (@shouples)
Top-scored candidate (rank 1 of 13). Team was explicitly requested on this PR.

Scoring breakdown for Dave Shoup (@shouples)

Factor	Score
Familiarity	46
Load penalty	-8
Round-robin	0
Total	38

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Generated by Review Hub. This comment is rewritten on each (re)assignment.