[BUG] Workflow, code generator path, UI component fixes (P1)

[cct08311github]

Fix secondary stability issues:

• BUG-4: Elsa workflow MySQL table auto-creation
• BUG-5: Code generator path configuration
• BUG-6: ComboBox selected/defaultvalue precedence

Upstream: dotnetcore/WTM#659, dotnetcore/WTM#661, dotnetcore/WTM#651

[cct08311github]

Fixed in PR #17 (merged into dotnet8). Covered by BUG-4 (Elsa MySQL), BUG-5 (CodeGen path), BUG-6 (ComboBox selected).