Improve garbage collection session handling

[nesitor]

Fix: Improve garbage collection sessions to handle it individually.

Self proofreading checklist

• Is my code clear enough and well documented
• Are my files well typed
• New translations have been added or updated if new strings have been introduced in the frontend
• Database migrations file are included
• Are there enough tests
• Documentation has been included (for new feature)

Changes

Added session context management for every file instead of a big one with session commits.