ci: vendor validation scripts and remove remote action pins

[hyperpolymath]

Automated PR to fix CI after deleted actions.

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[gitar-bot]

CI failed: CI validation failed because `.githooks/` and `flake.nix` were added to the repository root without being included in the root shape check allowlist.

Overview

The CI build failed during the root shape validation script check because unallowed entries (.githooks/ and flake.nix) were present in the repository root.

Failures

Root Shape Check Validation Failure (confidence: high)

• Type: build
• Affected jobs: 90126054780
• Related to change: yes
• Root cause: The script scripts/check-root-shape.sh found two root entries (.githooks/ and flake.nix) that are not permitted in the repository root without a corresponding allowlist entry.
• Suggested fix: Add .githooks/ and flake.nix to .machine_readable/root-allow.txt, or move them into the appropriate subdirectories.

Summary

• Change-related failures: 1 build failure caused by unallowed root entries introduced in the PR.
• Infrastructure/flaky failures: 0
• Recommended action: Update the root shape allowlist to include .githooks/ and flake.nix, or relocate them to their respective subdirectories.

Code Review ✅ Approved

Vendors validation scripts directly into the repository and removes remote action pins to stabilize CI workflows. No issues found.

Auto-approved: No blocking issues found.
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[gitar-bot]

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