🐛 ci: repair KB schema validation setup

[Jayant-kernel]

Fixes #19260

Repairs the KB nightly validation setup so the mission schema smoke test can run before gap tracking.

Changes:

• Adds a small local Node/AJV schema validator under .github/kb-scripts.
• Uses that helper from the mission validation scripts instead of expecting an ajv CLI on PATH.
• Keeps the workflow install step focused on pinned helper dependencies.

Testing:

• npm ci --ignore-scripts --prefix .github/kb-scripts
• node .github\kb-scripts\validate-json-schema.cjs web\src\lib\missions\mission.schema.json scripts\testdata\validate-missions\valid\minimal-runtime-aligned.json
• node .github\kb-scripts\validate-json-schema.cjs web\src\lib\missions\mission.schema.json scripts\testdata\validate-missions\invalid-missing-version\missing-version.json (expected failure)
• npm audit --omit=dev --prefix .github/kb-scripts
• git diff --check -- .github/kb-scripts/package.json .github/kb-scripts/package-lock.json .github/kb-scripts/validate-json-schema.cjs .github/workflows/kb-nightly-validation.yml scripts/validate-missions-schema-test.sh scripts/validate-missions.sh

Note: the full local shell smoke test reaches the mission validator but this Windows machine is missing jq; GitHub's Ubuntu runner provides it.

[kubestellar-prow]

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[Jayant-kernel]

@clubanderson
review my pr when you are free

[Copilot]

Pull request overview

Repairs the KB nightly validation pipeline by removing the dependency on an ajv CLI being present on PATH and instead using a pinned, local Node/AJV-based schema validation helper that the mission validation scripts can invoke directly.

Changes:

• Adds a small Node-based schema validator script under .github/kb-scripts (AJV + ajv-formats).
• Updates mission validation scripts to call the Node helper rather than ajv validate ....
• Simplifies the GitHub Actions workflow by no longer exporting .github/kb-scripts/node_modules/.bin onto PATH.

Build/lint are expected to be validated by CI on this PR.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
scripts/validate-missions.sh	Switches schema validation from ajv CLI to the new Node helper.
scripts/validate-missions-schema-test.sh	Updates the schema smoke test to exercise the Node helper instead of ajv CLI.
.github/workflows/kb-nightly-validation.yml	Removes the PATH modification step now that schema validation runs via node <script>.
.github/kb-scripts/validate-json-schema.cjs	New AJV-based schema validator entry point used by CI and scripts.
.github/kb-scripts/package.json	Pins AJV dependency versions for the helper.
.github/kb-scripts/package-lock.json	Locks dependency graph updates for the helper.

Files not reviewed (1)

• .github/kb-scripts/package-lock.json: Generated file

[clubanderson]

Scanner merge sweep: Unable to squash-merge this PR automatically — it modifies .github/workflows/kb-nightly-validation.yml and the current OAuth token lacks workflow scope. A maintainer with workflow permissions needs to merge this manually.

All CI checks are passing ✅ (build-gate: success).

[clubanderson]

⚠️ Scanner merge blocked — this PR modifies workflow files (.github/workflows/kb-nightly-validation.yml) and the current OAuth token lacks workflow scope. Needs manual merge by a maintainer with appropriate permissions.

[clubanderson]

⚠️ Scanner merge blocked — Cannot merge this PR via API due to GitHub OAuth scope limitation: the PR modifies .github/workflows/kb-nightly-validation.yml, which requires workflow scope that the current token lacks. This PR needs to be merged manually by a maintainer with appropriate permissions or via the GitHub web UI.