test(kb): add valid test file for workflow validation

- Create kb/01_projects/test/2025-11-11--runner-test--note.md
- Include all 18 required frontmatter fields
- Proper filename pattern, date, and type matching
- routing_confidence: 0.95 (valid, not in review queue)
- Test workflow fix for git revision error
- Verify KB lint workflow executes correctly

kb/01_projects/test/2025-11-11--runner-test--note.md

@@ -0,0 +1,77 @@
+---
+title: "Runner Test - KB Workflow Validation"
+date: "2025-11-11"
+captured_at: "2025-11-11"
+author: ["Test User"]
+source: { kind: chat, ref: "runner-test-workflow-validation" }
+source_type: chat
+project: ["tendril"]
+related_projects: ["tendril"]
+topics: ["testing", "workflows", "kb-system", "gitea-actions"]
+tags: ["test", "workflow", "validation", "runner", "gitea-actions"]
+type: note
+status: draft
+phase_relevance: ["phase-05"]
+routing_hint: "Test file for Gitea Actions runner and workflow validation - will be deleted after testing"
+proposed_path: "kb/01_projects/test/"
+routing_confidence: 0.95
+related: []
+summary: "Test KB file created to validate Gitea Actions runner setup and KB lint workflow functionality. This file will be deleted after successful workflow validation."
+key_takeaways: []
+action_candidates: []
+---
+
+# Runner Test - KB Workflow Validation
+
+This is a test file created to validate that the Gitea Actions runner setup and KB lint workflow (`kb-lint.yml`) are working correctly on the current branch.
+
+## Purpose
+
+- Test KB file naming validation
+- Test frontmatter validation with all required fields
+- Test workflow triggers on push events
+- Verify workflow provides clear validation results
+- Test that the git revision error fix is working
+
+## Expected Behavior
+
+When this file is committed and pushed to the current branch:
+1. KB lint workflow should trigger (because `kb/**/*.md` changed)
+2. Workflow should validate the file without git revision errors
+3. Workflow should pass (file follows all rules)
+4. No `fatal: bad revision 'HEAD~1...HEAD'` error should appear
+
+## File Details
+
+- **Filename**: `2025-11-11--runner-test--note.md`
+- **Type**: note
+- **Date**: 2025-11-11
+- **Location**: `kb/01_projects/test/`
+- **Routing Confidence**: 0.95 (high confidence, not in review queue)
+
+## Validation Rules Tested
+
+✅ Filename pattern: `YYYY-MM-DD--slug--type.md`  
+✅ Frontmatter exists and is valid YAML  
+✅ All 18 required fields present:
+  - title, date, captured_at, author, source, source_type
+  - project, related_projects, topics, tags
+  - type, status, phase_relevance
+  - routing_hint, proposed_path, routing_confidence
+  - related, summary, key_takeaways, action_candidates
+✅ Date in frontmatter matches filename date (2025-11-11)  
+✅ Type in frontmatter matches filename type (note)  
+✅ routing_confidence is numeric 0.00-1.00 (0.95)  
+✅ routing_confidence >= 0.60 (not in _review_queue/)
+
+## Workflow Fix Validation
+
+This file also tests that the workflow fix for the git revision error is working:
+- Uses `github.event.before` and `github.event.after` instead of `HEAD~1...HEAD`
+- Should work correctly with shallow clones
+- Should not produce `fatal: bad revision` errors
+
+---
+
+**Note**: This file will be deleted after workflow validation is confirmed successful.
+