feat: bump typescript (#14507)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
  * Upgraded TypeScript toolchain to v5.9.3 across packages and tooling.
* Removed legacy ts-node and migrated developer tooling to newer
runtimes (tsx/SWC) where applicable.
* **Documentation**
* Updated developer CLI docs and runtime behavior notes to reflect the
new loader/runtime for running TypeScript files; no changes to public
APIs or end-user behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/models/__tests__/access-token.spec.ts

@@ -4,7 +4,7 @@ import test from 'ava';
 import { createModule } from '../../__tests__/create-module';
 import { Mockers } from '../../__tests__/mocks';
 import { Due } from '../../base';
-import { Models } from '..';
+import { Models } from '../index';
 
 const module = await createModule();
 const models = module.get(Models);

packages/backend/server/src/models/__tests__/blob.spec.ts

@@ -2,7 +2,7 @@ import test from 'ava';
 
 import { createModule } from '../../__tests__/create-module';
 import { Mockers } from '../../__tests__/mocks';
-import { Models } from '..';
+import { Models } from '../index';
 
 const module = await createModule();
 const models = module.get(Models);

packages/backend/server/src/models/__tests__/comment-attachment.spec.ts

@@ -2,7 +2,7 @@ import test from 'ava';
 
 import { createModule } from '../../__tests__/create-module';
 import { Mockers } from '../../__tests__/mocks';
-import { Models } from '..';
+import { Models } from '../index';
 
 const module = await createModule();
 const models = module.get(Models);

packages/backend/server/src/models/__tests__/comment.spec.ts

@@ -4,8 +4,8 @@ import test from 'ava';
 
 import { createModule } from '../../__tests__/create-module';
 import { Mockers } from '../../__tests__/mocks';
-import { Models } from '..';
 import { CommentChangeAction, Reply } from '../comment';
+import { Models } from '../index';
 
 const module = await createModule({});
 

packages/backend/server/src/models/__tests__/doc.spec.ts

@@ -4,7 +4,7 @@ import test from 'ava';
 
 import { createModule } from '../../__tests__/create-module';
 import { Mockers } from '../../__tests__/mocks';
-import { Models } from '..';
+import { Models } from '../index';
 
 const module = await createModule({});
 

packages/backend/server/src/models/__tests__/user-settings.spec.ts

@@ -3,7 +3,7 @@ import { ZodError } from 'zod';
 
 import { createModule } from '../../__tests__/create-module';
 import { Mockers } from '../../__tests__/mocks';
-import { Models } from '..';
+import { Models } from '../index';
 
 const module = await createModule();
 const models = module.get(Models);