chore(notediscovery): bump notediscovery to 0.28.1

[mberlofa]

Closes #700.

Summary

• Bump NoteDiscovery from 0.27.3 to 0.28.1.
• Update chart defaults, values schema, unittest expectations, README, and design docs.
• Document the 0.28.x large-vault indexing/storage path changes and keep the chart storage contract stable through persistence.mountPath.

Upstream Evidence

• GitHub release: https://github.com/gamosoft/NoteDiscovery/releases/tag/v0.28.1
• Release status verified with GitHub CLI: not draft, not pre-release, published 2026-07-06T07:59:01Z.
• Docker image manifest verified: ghcr.io/gamosoft/notediscovery:0.28.1.
• Manifest platforms: linux/amd64, linux/arm64.
• Upstream notes: 0.28.0 adds the large-vault in-memory note index, background warmup, faster search/graph/stats paths, and configurable NOTES_DIR/PLUGINS_DIR; 0.28.1 fixes task rendering.

Site Sync

• Site PR: docs(notediscovery): sync 0.28.1 default site#381

Validation

• make image-verify IMAGE=ghcr.io/gamosoft/notediscovery:0.28.1
• make deps-check CHART=notediscovery
• helm unittest charts/notediscovery passed: 8 suites, 33 tests.
• make standards-check CHART=notediscovery
• node scripts/charts/template-standards-check.js --chart notediscovery
• make validate-chart CHART=notediscovery passed fully: 19 layers, including k3d behavioral validation for default plus all CI values scenarios.
• make site-sync-check CHART=notediscovery
• make release-check REPO=charts
• make attribution-check REPO=charts

Summary by CodeRabbit

• New Features

  • Updated the bundled NoteDiscovery version to 0.28.1 across the Helm chart and default image settings.

• Documentation

  • Revised setup and design docs to reference the newer image version.
  • Added upgrade notes with guidance for safer upgrades, including storage consistency and backup recommendations.

• Tests

  • Updated chart tests to expect the new pinned image version.

[github-actions]

Standards Check (GR-079) — PASS

Every changed chart fully passes standards-check.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 003abbe0-85d0-45a9-8adf-8961818b2dea

📥 Commits

Reviewing files that changed from the base of the PR and between 66a35d5 and bf4a29f.

📒 Files selected for processing (6)

• charts/notediscovery/Chart.yaml
• charts/notediscovery/DESIGN.md
• charts/notediscovery/README.md
• charts/notediscovery/tests/templates_test.yaml
• charts/notediscovery/values.schema.json
• charts/notediscovery/values.yaml

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📝 Walkthrough

Walkthrough

This PR bumps the NoteDiscovery Helm chart's image version from 0.27.3 to 0.28.1 across Chart.yaml, values.yaml, values.schema.json, DESIGN.md, README.md, and the unit test. README.md also adds a new "Upgrade Notes" section describing 0.28.1 changes and upgrade guidance.

Changes

NoteDiscovery Image Version Bump

Layer / File(s)	Summary
Chart metadata and values update charts/notediscovery/Chart.yaml, charts/notediscovery/values.yaml, charts/notediscovery/values.schema.json	appVersion, Artifact Hub changelog entry, image tag default, and values tag are bumped from 0.27.3 to 0.28.1.
Documentation updates charts/notediscovery/DESIGN.md, charts/notediscovery/README.md	Image references updated to 0.28.1; README adds an "Upgrade Notes" section covering vault performance work, task rendering fix, in-memory note index, background index warmup, and PVC backup guidance.
Test assertion update charts/notediscovery/tests/templates_test.yaml	The pinned image assertion is updated to expect the 0.28.1 tag.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Related issues: #700 (upstream image update for notediscovery, 0.27.3 → 0.28.1)

Suggested labels: chore, dependencies, notediscovery

Suggested reviewers: helmforgedev/charts maintainers

🐰 A tiny bump, from 27 to 28,
Notes now index a little more,
Backups tucked away with care,
Docs updated everywhere,
Hop along, the chart's secure!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title is concise and accurately summarizes the main change: bumping NoteDiscovery to 0.28.1.
Linked Issues check	✅ Passed	The chart update, defaults, tests, and docs all align with issue #700's request to move NoteDiscovery to 0.28.1.
Out of Scope Changes check	✅ Passed	The README, DESIGN, schema, and test updates are all relevant support changes for the version bump, with no obvious unrelated scope.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/notediscovery-0.28.1

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[github-actions]

🟢 Security Scan: notediscovery

Framework	Score
MITRE + NSA + SOC2	87.37374%

✅ Security posture acceptable.