## Summary
Remove SQLLite and real sql queries and replace them with `SELECT` and `DELETE` queries that interact with the node's file system and service operating status.
## Test process
Existing unit tests pass after logic was changed.
## Checklist
- [x] PR is linked to a **work item**
- [ ] **acceptance criteria** of linked ticket are met
- [x] performed **self-review** of the code
- [x] written **tests** for any new functionality added with this PR
- [x] updated the **documentation** if this PR changes or adds functionality
- [ ] written/updated **design docs** if this PR implements new functionality
- [ ] updated the **change log**
- [x] ran **pre-commit** checks for code style
- [x] attended to any **TO-DOs** left in the code
Related work items: #1971
## Summary
Remove gate and integrate SB3 agent natively.
This includes:
- agent saving
- checkpoints
- session output directory
- simulation output (such as syslogs) are now in the session output directory
- agent loading
- training progress bar (with `enlighten`)
## Test process
End to end tests that verify that a session is being created correctly with a network
They also check the outputs exist.
## Checklist
- [y] PR is linked to a **work item**
- [upcoming PR] **acceptance criteria** of linked ticket are met
- [y] performed **self-review** of the code
- [loading not tested but need to move onto Ray now] written **tests** for any new functionality added with this PR
- [n] updated the **documentation** if this PR changes or adds functionality
- [n] written/updated **design docs** if this PR implements new functionality
- [n] updated the **change log**
- [y] ran **pre-commit** checks for code style
- [n] attended to any **TO-DOs** left in the code
Related work items: #1971
