CRITICAL FIX: Correct InterWorx database prefix pattern (verified from official docs)

DOCUMENTATION CORRECTION - VERIFIED FROM INTERWORX DOCS:

Database Prefix Pattern:
- ❌ OLD (WRONG): InterWorx uses first8charsOfDomain_dbname
- ✅ NEW (CORRECT): InterWorx uses username_dbname (SAME AS CPANEL!)

Source: https://appendix.interworx.com/current/siteworx/mysql/database-guide.html

Official InterWorx Documentation States:
"All databases created in SiteWorx will be prefixed by the SiteWorx
account unix username."

This means:
- cPanel: username_dbname
- InterWorx: username_dbname (SAME!)
- Plesk: no prefix (TBD)

ALSO VERIFIED FROM OFFICIAL DOCS:

File System Structure:
✅ Home: /home/USERNAME/
✅ Docroot: /home/USERNAME/DOMAIN/html/
✅ Access logs: /home/USERNAME/var/DOMAIN/logs/transfer.log
✅ Error logs: /home/USERNAME/var/DOMAIN/logs/error.log

Source: https://appendix.interworx.com/current/nodeworx/general/other/log-file-locations.html

IMPACT:
- Our CODE doesn't use database prefixes, so scripts still work correctly
- Only DOCUMENTATION was wrong
- Updated REFDB_FORMAT.txt and .sysref

RESOLVED UNKNOWNS:
- ✅ InterWorx database prefix pattern
- ✅ InterWorx file system paths
- ✅ InterWorx log locations

REFDB_FORMAT.txt

@@ -762,8 +762,8 @@ paths:
 # CRITICAL DATABASE PREFIX PATTERN (MOST IMPORTANT!)
 database_prefixes:
   cpanel: username_dbname
-  interworx: first8charsOfDomain_dbname  # NOT username!
+  interworx: username_dbname  # SAME AS CPANEL! (verified from official docs)
-  plesk: no prefix
+  plesk: no prefix (TBD - needs verification)
 
 # Module Classification System
 classes:
@@ -862,10 +862,13 @@ commits:
 
 critical_interworx_verification:
   filesystem:
-    - Home: /home/USERNAME/
+    - VERIFIED Home: /home/USERNAME/
-    - Docroot: /home/USERNAME/DOMAIN/html/
+    - VERIFIED Docroot: /home/USERNAME/DOMAIN/html/
-    - Access logs: /home/USERNAME/var/DOMAIN/logs/access_log
+    - VERIFIED Access logs: /home/USERNAME/var/DOMAIN/logs/transfer.log (HTTP)
-    - Error logs: /home/USERNAME/var/DOMAIN/logs/error_log
+    - VERIFIED Access logs SSL: /home/USERNAME/var/DOMAIN/logs/transfer-ssl.log (HTTPS)
+    - VERIFIED Error logs: /home/USERNAME/var/DOMAIN/logs/error.log (HTTP)
+    - VERIFIED Error logs SSL: /home/USERNAME/var/DOMAIN/logs/error-ssl.log (HTTPS)
+    - Source: https://appendix.interworx.com/current/nodeworx/general/other/log-file-locations.html
 
   domain_to_user:
     - Method: grep vhost_*.conf for ServerName + SuexecUserGroup
@@ -878,9 +881,10 @@ critical_interworx_verification:
     - Option 3: Check for InterWorx CLI tools
 
   database_prefix:
-    - CRITICAL: Assumed first8charsOfDomain_
+    - VERIFIED: Uses username_ prefix (same as cPanel!)
-    - Example: testdomain.com → testdoma_wp123
+    - Source: https://appendix.interworx.com/current/siteworx/mysql/database-guide.html
-    - MUST VERIFY on real server!
+    - Example: username "testuser" → testuser_wp123, testuser_db456
+    - InterWorx automatically prefixes with SiteWorx account unix username
 
   cron_management:
     - Assumed: Standard Linux crontab -u username
@@ -956,10 +960,11 @@ commands_to_run_on_test_servers:
 
 unknowns_blocking_full_support:
   interworx:
-    - Database prefix pattern (assumed but not verified)
+    - ✅ RESOLVED: Database prefix is username_ (verified from docs)
-    - Best method for user→domains lookup
+    - ✅ RESOLVED: File paths all verified from official docs
-    - PHP version configuration method
+    - Best method for user→domains lookup (vhost parsing works)
-    - InterWorx CLI commands availability
+    - PHP version configuration method (non-critical)
+    - InterWorx CLI commands availability (optional, vhost parsing works)
 
   plesk:
     - Database prefix pattern (assumed no prefix)