feat: make workflow objects searchable (#18906)

## Summary
- Adds `isSearchable: true` to the workflow standard object definition
so new workspaces get searchable workflows automatically
- Adds a `upgrade:1-20:make-workflow-searchable` migration command that
flips the `isSearchable` flag on the `objectMetadata` row for existing
workspaces, with proper cache invalidation and metadata version
increment
- Registers the command in the 1-20 upgrade module and the
`upgrade.command.ts` orchestrator

The `searchVector` stored generated column already exists on the
workflow table, so no data backfill is needed — this is purely a
metadata flag change that makes the search service include workflows in
results.

## Test plan
- [x] `--dry-run` logs what it would do without making changes
- [x] Actual run updates both workspaces and invalidates caches
- [x] Idempotent: re-running skips already-searchable workspaces
- [x] Typecheck passes
- [x] Lint passes on changed files


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

packages/twenty-server/src/database/commands/upgrade-version-command/upgrade.command.ts

@@ -43,6 +43,7 @@ import { IdentifyObjectPermissionMetadataCommand } from 'src/database/commands/u
 import { IdentifyPermissionFlagMetadataCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-identify-permission-flag-metadata.command';
 import { MakeObjectPermissionUniversalIdentifierAndApplicationIdNotNullableMigrationCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-make-object-permission-universal-identifier-and-application-id-not-nullable-migration.command';
 import { MakePermissionFlagUniversalIdentifierAndApplicationIdNotNullableMigrationCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-make-permission-flag-universal-identifier-and-application-id-not-nullable-migration.command';
+import { MakeWorkflowSearchableCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-make-workflow-searchable.command';
 import { MigrateMessagingInfrastructureToMetadataCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-migrate-messaging-infrastructure-to-metadata.command';
 import { MigrateRichTextToTextCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-migrate-rich-text-to-text.command';
 import { GenerateApplicationSdkClientsCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-generate-application-sdk-clients.command';
@@ -113,6 +114,7 @@ export class UpgradeCommand extends UpgradeCommandRunner {
     protected readonly backfillFieldWidgetsCommand: BackfillFieldWidgetsCommand,
     protected readonly backfillSelectFieldOptionIdsCommand: BackfillSelectFieldOptionIdsCommand,
     protected readonly updateStandardIndexViewNamesCommand: UpdateStandardIndexViewNamesCommand,
+    protected readonly makeWorkflowSearchableCommand: MakeWorkflowSearchableCommand,
   ) {
     super(
       workspaceRepository,
@@ -176,6 +178,7 @@ export class UpgradeCommand extends UpgradeCommandRunner {
       this.backfillFieldWidgetsCommand,
       this.backfillSelectFieldOptionIdsCommand,
       this.updateStandardIndexViewNamesCommand,
+      this.makeWorkflowSearchableCommand,
       this.generateApplicationSdkClientsCommand,
     ];