• Remove deprecated getMongoRepository() and getMongoManager() global functions
• Remove unused MongoRepository and MongoEntityManager type imports
• Update documentation with migration guidance for DataSource methods
• Update MongoDB driver example to use instance methods

Remove MongoDB deprecated global functions

• Removed MongoRepository and MongoEntityManager type imports
• Deleted getMongoManager() deprecated global function
• Deleted getMongoRepository() deprecated global function
• Preserved all other repository and manager getter functions

src/globals.ts

Update MongoDB example to use DataSource

• Removed getMongoManager() import statement from example
• Updated code example to use myDataSource.manager.save() instead of deprecated global
• Simplified MongoDB usage pattern in documentation

docs/docs/drivers/mongodb.md

Add migration guide for MongoDB globals

• Added new migration section for removed MongoDB globals
• Provided before/after code examples showing migration path
• Documented replacement using dataSource.mongoManager and dataSource.getMongoRepository()

docs/docs/guides/8-migration-v1.md

Description

mongodb.md now replaces getMongoManager() with myDataSource.manager.save(user), but the
migration guide recommends dataSource.mongoManager. Both work at runtime, but manager is typed
as EntityManager, so TS users lose MongoEntityManager typing/autocomplete for Mongo-specific APIs
and the docs become inconsistent.

Code

docs/docs/drivers/mongodb.md[205]

+await myDataSource.manager.save(user)

Evidence

The updated MongoDB docs use myDataSource.manager, but DataSource.manager is declared as
EntityManager (generic). TypeORM provides DataSource.mongoManager specifically to expose
MongoEntityManager typing, and the migration guide already documents it as the replacement for
getMongoManager(). manager.save() still works because EntityManager.save() is generic and
executes via EntityPersistExecutor, and for MongoDB the runtime manager instance is created as
MongoEntityManager.

docs/docs/drivers/mongodb.md[190-206]
src/data-source/DataSource.ts[83-87]
src/data-source/DataSource.ts[165-179]
src/entity-manager/EntityManagerFactory.ts[16-24]
src/entity-manager/EntityManager.ts[443-480]
docs/docs/guides/8-migration-v1.md[146-160]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`docs/docs/drivers/mongodb.md` now demonstrates saving via `myDataSource.manager.save(user)` after removing the `getMongoManager()` global. While this works, it’s inconsistent with the migration guide and drops MongoDB-specific typing/autocomplete because `DataSource.manager` is declared as `EntityManager`.

### Issue Context
TypeORM provides `DataSource.mongoManager` specifically to expose `MongoEntityManager` typing for MongoDB connections.

### Fix Focus Areas
- docs/docs/drivers/mongodb.md[190-206]

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