feat: replace hardcoded AI model constants with JSON seed catalog (#18818)

## Summary

- Replaces per-provider TypeScript constant files
(`openai-models.const.ts`, `anthropic-models.const.ts`, etc.) with a
single `ai-providers.json` catalog as the source of truth
- Adds runtime model discovery via AI SDK for self-hosted providers,
with `models.dev` enrichment for pricing/capabilities
- Introduces composite model IDs (`provider/modelId`) for canonical,
conflict-free identification
- Simplifies provider configuration: API keys are injected from
environment variables (e.g., `OPENAI_API_KEY`)
- Adds admin panel UI for provider management (add/remove/test), model
discovery, recommended model configuration, and default fast/smart model
selection per workspace
- Removes deprecated config variables (`AI_DISABLED_MODEL_IDS`,
`AUTO_ENABLE_NEW_AI_MODELS`, etc.)
- Adds database migration for composite model ID format

## Test plan

- [ ] Server typecheck passes
- [ ] Frontend typecheck passes
- [ ] Server unit tests pass
- [ ] Frontend unit tests pass
- [ ] CI pipeline green
- [ ] Admin panel AI tab loads correctly
- [ ] Provider discovery works for configured providers
- [ ] Model recommendation toggles persist
- [ ] Default fast/smart model selection works


Made with [Cursor](https://cursor.com)

packages/twenty-server/src/database/commands/database-command.module.ts

@@ -1,6 +1,7 @@
 import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 
+import { AiSyncModelsDevCommand } from 'src/database/commands/ai-sync-models-dev.command';
 import { CronRegisterAllCommand } from 'src/database/commands/cron-register-all.command';
 import { DataSeedWorkspaceCommand } from 'src/database/commands/data-seed-dev-workspace.command';
 import { ListOrphanedWorkspaceEntitiesCommand } from 'src/database/commands/list-and-delete-orphaned-workspace-entities.command';
@@ -70,6 +71,7 @@ import { AutomatedTriggerModule } from 'src/modules/workflow/workflow-trigger/au
     StaleRegistrationCleanupModule,
   ],
   providers: [
+    AiSyncModelsDevCommand,
     DataSeedWorkspaceCommand,
     ConfirmationQuestion,
     CronRegisterAllCommand,