fix(models): replace postgresql.UUID in 6 more user_management models (#2533)

[mrveiss]

Summary

• Splits JSONB/UUID imports in 6 user_management model files that previously imported both from sqlalchemy.dialects.postgresql
• Replaces postgresql.UUID with dialect-agnostic sqlalchemy.types.Uuid while keeping postgresql.JSONB imports
• Files: user.py, organization.py, team.py, sso.py, audit.py, api_key.py
• Follows the same pattern as PR fix(models): replace postgresql.UUID with database-agnostic UUID (#2495) #2532 which fixed the first 5 model files

Closes #2533

[github-actions]

⚠️ SSOT Configuration Compliance: Violations Found

Metric	Count
Total Violations	2
SSOT Violations (high priority)	1
Other Violations	1

⚠️ 1 values have SSOT config equivalents!

These should be replaced with SSOT config imports:

Python:

from src.config.ssot_config import config
# Use: config.vm.main, config.port.backend, config.backend_url

TypeScript:

import config from '@/config/ssot-config'
// Use: config.vm.main, config.port.backend, config.backendUrl

📖 See SSOT_CONFIG_GUIDE.md for documentation.