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/PHASE2_COMPLETION_SUMMARY.md

@@ -110,7 +110,7 @@ Get matching suggestions for a specific unlinked book.
   "suggestions": [
     {
       "media_item_id": "uuid-2",
-      "bookmann_uuid": "uuid-2",
+      "bookhoard_uuid": "uuid-2",
       "confidence": 0.95,
       "match_method": "sha256_match"
     }
@@ -321,7 +321,7 @@ With default threshold of 0.8, only matches with 80%+ confidence are auto-linked
 
 ### Build Verification
 ```bash
-cd /home/nymusicman/Code/bookmann
+cd /home/nymusicman/Code/bookhoard
 go build ./cmd/server  # ✅ Successful
 cd internal/database && sqlc generate  # ✅ Successful
 cd templates && templ generate  # ✅ Successful