feat(knowledge): add tag management API (KNOW-003)

- Add Tag DTOs (CreateTagDto, UpdateTagDto) with validation
- Implement TagsService with CRUD operations
- Add TagsController with authenticated endpoints
- Support automatic slug generation from tag names
- Add workspace isolation for tags
- Include entry count in tag responses
- Add findOrCreateTags method for entry creation/update
- Implement comprehensive test coverage (29 tests passing)

Endpoints:
- GET /api/knowledge/tags - List workspace tags
- POST /api/knowledge/tags - Create tag
- GET /api/knowledge/tags/:slug - Get tag by slug
- PUT /api/knowledge/tags/:slug - Update tag
- DELETE /api/knowledge/tags/:slug - Delete tag
- GET /api/knowledge/tags/:slug/entries - List entries with tag

Related: KNOW-003

pnpm-lock.yaml

@@ -56,6 +56,9 @@ importers:
       '@prisma/client':
         specifier: ^6.19.2
         version: 6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3)
+      '@types/marked':
+        specifier: ^6.0.0
+        version: 6.0.0
       better-auth:
         specifier: ^1.4.17
         version: 1.4.17(@prisma/client@6.19.2(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(typescript@5.9.3))(better-sqlite3@12.6.2)(drizzle-orm@0.41.0(@prisma/client@5.22.0(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)))(@types/pg@8.16.0)(better-sqlite3@12.6.2)(kysely@0.28.10)(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3)))(next@16.1.6(@babel/core@7.28.6)(react-dom@19.2.4(react@19.2.4))(react@19.2.4))(pg@8.17.2)(prisma@6.19.2(magicast@0.3.5)(typescript@5.9.3))(react-dom@19.2.4(react@19.2.4))(react@19.2.4)(vitest@4.0.18(@types/node@22.19.7)(jiti@2.6.1)(jsdom@26.1.0)(terser@5.46.0)(tsx@4.21.0))
@@ -65,12 +68,18 @@ importers:
       class-validator:
         specifier: ^0.14.3
         version: 0.14.3
+      marked:
+        specifier: ^17.0.1
+        version: 17.0.1
       reflect-metadata:
         specifier: ^0.2.2
         version: 0.2.2
       rxjs:
         specifier: ^7.8.1
         version: 7.8.2
+      slugify:
+        specifier: ^1.6.6
+        version: 1.6.6
     devDependencies:
       '@better-auth/cli':
         specifier: ^1.4.17
@@ -1584,6 +1593,10 @@ packages:
   '@types/json-schema@7.0.15':
     resolution: {integrity: sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==}
 
+  '@types/marked@6.0.0':
+    resolution: {integrity: sha512-jmjpa4BwUsmhxcfsgUit/7A9KbrC48Q0q8KvnY107ogcjGgTFDlIL3RpihNpx2Mu1hM4mdFQjoVc4O6JoGKHsA==}
+    deprecated: This is a stub types definition. marked provides its own type definitions, so you do not need this installed.
+
   '@types/node@22.19.7':
     resolution: {integrity: sha512-MciR4AKGHWl7xwxkBa6xUGxQJ4VBOmPTF7sL+iGzuahOFaO0jHCsuEfS80pan1ef4gWId1oWOweIhrDEYLuaOw==}
 
@@ -3042,6 +3055,11 @@ packages:
     resolution: {integrity: sha512-hXdUTZYIVOt1Ex//jAQi+wTZZpUpwBj/0QsOzqegb3rGMMeJiSEu5xLHnYfBrRV4RH2+OCSOO95Is/7x1WJ4bw==}
     engines: {node: '>=10'}
 
+  marked@17.0.1:
+    resolution: {integrity: sha512-boeBdiS0ghpWcSwoNm/jJBwdpFaMnZWRzjA6SkUMYb40SVaN1x7mmfGKp0jvexGcx+7y2La5zRZsYFZI6Qpypg==}
+    engines: {node: '>= 20'}
+    hasBin: true
+
   math-intrinsics@1.1.0:
     resolution: {integrity: sha512-/IXtbwEk5HTPyEwyKX6hGkYXxM9nbj64B+ilVJnC/R6B0pH5G4V3b0pVbL7DBj4tkhBAppbQUlf6F6Xl9LHu1g==}
     engines: {node: '>= 0.4'}
@@ -3642,6 +3660,10 @@ packages:
   sisteransi@1.0.5:
     resolution: {integrity: sha512-bLGGlR1QxBcynn2d5YmDX4MGjlZvy2MRBDRNHLJ8VI6l6+9FUiyTFNJ0IveOSP0bcXgVDPRcfGqA0pjaqUpfVg==}
 
+  slugify@1.6.6:
+    resolution: {integrity: sha512-h+z7HKHYXj6wJU+AnS/+IH8Uh9fdcX1Lrhg1/VMdf9PwoBQXFcXiAdsy2tSK0P6gKwJLXp02r90ahUCqHk9rrw==}
+    engines: {node: '>=8.0.0'}
+
   source-map-js@1.2.1:
     resolution: {integrity: sha512-UXWMKhLOwVKb728IUtQPXxfYU+usdybtUrK/8uGE8CQMvrhOpwvzDBwj0QhSL7MQc7vIsISBG8VQ8+IDQxpfQA==}
     engines: {node: '>=0.10.0'}
@@ -5518,6 +5540,10 @@ snapshots:
 
   '@types/json-schema@7.0.15': {}
 
+  '@types/marked@6.0.0':
+    dependencies:
+      marked: 17.0.1
+
   '@types/node@22.19.7':
     dependencies:
       undici-types: 6.21.0
@@ -7011,6 +7037,8 @@ snapshots:
     dependencies:
       semver: 7.7.3
 
+  marked@17.0.1: {}
+
   math-intrinsics@1.1.0: {}
 
   media-typer@0.3.0: {}
@@ -7668,6 +7696,8 @@ snapshots:
 
   sisteransi@1.0.5: {}
 
+  slugify@1.6.6: {}
+
   source-map-js@1.2.1: {}
 
   source-map-support@0.5.21: