fix(build): add missing excel_to_sql.auto_pilot to hiddenimports

Root cause analysis:
- Code imports PatternDetector from excel_to_sql.auto_pilot
- PyInstaller was NOT including auto_pilot module in executable
- ImportError triggers message "excel-to-sql>=0.3.0 is required"

The actual issue is NOT the version, but missing module bundling.

Excel-to-sql 0.3.0 structure:
- auto_pilot/ (PatternDetector, QualityScorer, etc.)
- sdk/ (ExcelToSqlite)
- transformations/, validators/, profiling/, ui/

Fix: Add excel_to_sql.auto_pilot to hiddenimports in spec file.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: codewizdave

build/gui.spec

@@ -74,8 +74,7 @@ a = Analysis(
 
         # Excel-to-SQL
         'excel_to_sql',
-        'excel_to_sql.sdk',
-        'excel_to_sql.validators',
+        'excel_to_sql.auto_pilot',  # Used by autopilot.py for PatternDetector
     ],
     hookspath=[],
     hooksconfig={},