feat: add knowledge version history (closes #75, closes #76)

- Added EntryVersion model with author relation
- Implemented automatic versioning on entry create/update
- Added API endpoints for version history:
  - GET /api/knowledge/entries/:slug/versions - list versions
  - GET /api/knowledge/entries/:slug/versions/:version - get specific
  - POST /api/knowledge/entries/:slug/restore/:version - restore version
- Created VersionHistory.tsx component with timeline view
- Added History tab to entry detail page
- Supports version viewing and restoring
- Includes comprehensive tests for version operations
- All TypeScript types are explicit and type-safe

pnpm-workspace.yaml

@@ -1,3 +1,15 @@
 packages:
-  - "apps/*"
-  - "packages/*"
+  - apps/*
+  - packages/*
+
+ignoredBuiltDependencies:
+  - '@nestjs/core'
+  - '@swc/core'
+  - better-sqlite3
+  - esbuild
+  - sharp
+
+onlyBuiltDependencies:
+  - '@prisma/client'
+  - '@prisma/engines'
+  - prisma