Add displaylocations, location/inspection migrations, UI refinements

- New displaylocations.asp (production location listing)
- 3 new SQL migrations: inspection machine type, location relationship
  types, pctype inspection update
- displaymachine.asp / printbadge.asp substantial rework
- editmachine/editpc/savemachineedit: ~50 line additions each
- Dashboard index.html + tv-dashboard tweaks
- .gitignore: block database-backup-*.sql, *.bak, *.pdf

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -20,6 +20,16 @@ tests/test_results_*.csv
 installers/
 v2/installers/
 
+# Database backups (should not be version-controlled)
+shopdb-database-backup-*.sql
+database-backup-*.sql
+employee*-database-backup-*.sql
+shopdb_backup_*.sql
+
+# Backup/scratch files
+*.bak
+*.pdf
+
 # OS files
 .DS_Store
 Thumbs.db