## Summary
Required to complete #2448
DB Client will store last query response - Data Fusion Service will use this to know the difference between no response and invalid response
## Test process
*How have you tested this (if applicable)?*
## Checklist
- [X] PR is linked to a **work item**
- [X] **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
- [ ] 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
- [ ] attended to any **TO-DOs** left in the code
#2448: store last query response for db client
Related work items: #2448
instead of UUID for link primary key in describe state, we are using something more like
router_1:eth-3<->switch_1:eth-8
**all configs need to change the observation space link schema as a result of this change**
It looks like there are a lot of changed files, but it's mostly just removing the `game` parameter from observations and removing 'ref' from config files.
:)
also we no longer need to specify `ref` for nodes, services, or applications. (**but existing configs will not break based on this change!**)
Related work items: #2450
Tiny small bugfix.
make sure IO settings are read before the game config in the environments. This is so that SIM_OUTPUT global variable is set before constructing game objects.
Related work items: #2446
## Summary
The file being backed up by the database service does not restore the last visible health status of the db file before being restored
## Test process
- Tests that the visible health status is carried forward when the file is corrupted and then restored
- Tests that the visible health status is carried forward when the file is corrupted, deleted and then restored
## Checklist
- [X] PR is linked to a **work item**
- [X] **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
- [ ] 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
- [ ] attended to any **TO-DOs** left in the code
#2437: fix the visible health status not being carried on after restoring backup file
Related work items: #2437
## Summary
* Remove the usecase-specific and agent-specific observation classes, replacing with a more flexible system
* Add configuration schemas to every observation class
* Add router, firewall, port, and application observation
* Re-shape the dict structure of observations to make it adhere to CAOS 0.8
* Change existing configs to use the new structure
* make host observation separate
## Test process
existing and new unit tests as well as ad hoc notebooks
## Checklist
- [ ] PR is linked to a **work item**
- [ ] **acceptance criteria** of linked ticket are met
- [ ] performed **self-review** of the code
- [ ] written **tests** for any new functionality added with this PR
- [ ] updated the **documentation** if this PR changes or adds functionality
- [ ] written/updated **design docs** if this PR implements new functionality
- [ ] updated the **change log**
- [ ] ran **pre-commit** checks for code style
- [ ] attended to any **TO-DOs** left in the code
Related work items: #2417
## Summary
Added ACL addrule and removerule for routers and firewalls
## Test process
New test created to cover all possibilities
## Checklist
- [x] PR is linked to a **work item**
- [x] **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
- [ ] 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: #2402, #2415
