fix(models): replace postgresql.UUID with Uuid in 9 more model files (#2563)

[mrveiss]

Summary

• Splits JSONB/UUID imports in 9 autobot-backend/models/ files
• Keeps JSONB (and ARRAY where applicable) from sqlalchemy.dialects.postgresql
• Replaces UUID with dialect-agnostic sqlalchemy.types.Uuid
• Follows same pattern as PRs fix(models): replace postgresql.UUID with database-agnostic UUID (#2495) #2532 and fix(models): replace postgresql.UUID in 6 more user_management models (#2533) #2551
• Files: process_run, workflow_audit, session_collaboration, activities, heartbeat, task_delegation, config_revision, approval, secret

Closes #2563

[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.