Document Manager — pyrite

Write-path coordination for KB entries. Consolidates the save-register-index pattern into a single class, completing the ODM abstraction layer.

Pattern

``` KBRepository.save() → PyriteDB.register_kb() → IndexManager.index_entry() ```

`save_entry(entry, kb_name, kb_config)` — save to disk, register KB, index

`delete_entry(entry_id, kb_name, kb_config)` — delete from disk and index

`index_entry(entry, kb_name, file_path)` — re-index from existing file

`KBService.create_entry()`, `update_entry()`, `delete_entry()` — all write paths go through DocumentManager

storage-layer — PyriteDB and IndexManager

kb-service — business logic layer that uses DocumentManager