feat(kb): Issue Label Scheme auf Vierachsen-Schema und Body-als-Wahrheit nachgezogen (#41)

Files changed:
- kb/concepts/INDEX.md
- kb/concepts/Issue Label Scheme.md
- kb/entities/projects/Chemenu.md
- kb/entities/tools/Gitea MCP Server.md
- kb/index.md
- kb/log.md
- kb/provenance.md
- kb/sources/INDEX.md
- kb/sources/Source - Gitea Issue 41 - Issue Management and Label Scheme 2026-09-02.md
- raw/notes/Gitea Issue 41 - Issue Management and Label Scheme 2026-09-02.md

kb/index.md

@@ -13,11 +13,11 @@ The page tables live in a generated `INDEX.md` inside each collection, linked be
 
 ## Statistics
 
-- **Total Pages:** 180
+- **Total Pages:** 181
 - **Comparisons:** 1
 - **Concepts:** 80
 - **Entities:** 72
-- **Sources:** 27
+- **Sources:** 28
 - **Last Updated:** 2026-09-02
 
 ---
@@ -29,7 +29,7 @@ The page tables live in a generated `INDEX.md` inside each collection, linked be
 | `comparisons/` | 1 | [comparisons/INDEX.md](comparisons/INDEX.md) |
 | `concepts/` | 80 | [concepts/INDEX.md](concepts/INDEX.md) |
 | `entities/` | 72 | [entities/INDEX.md](entities/INDEX.md) |
-| `sources/` | 27 | [sources/INDEX.md](sources/INDEX.md) |
+| `sources/` | 28 | [sources/INDEX.md](sources/INDEX.md) |
 
 ### entities/