Update documentation and API tests: Bookmann → Bookhoard

Documentation updates:
- All docs/ files: Update project references
- Bruno API collection: Update collection name and tests
- Device setup guides: Update all examples
- Implementation plan: Update database schema examples
- README files: Update project references

Part of project rename to Bookhoard.

docs/PHASE1_COMPLETION_SUMMARY.md

@@ -161,7 +161,7 @@ The conversion service handles multiple failure scenarios:
 
 ### Build Verification
 ```bash
-go build -o /tmp/bookmann-test ./cmd/server
+go build -o /tmp/bookhoard-test ./cmd/server
 # Success: Exit code 0
 ```