Merged PR 507: #2748: Port of PrimAITE Internal changes.

## Summary
This a port of the AgentHistoryItem DB Admin (GreenAdminDatabaseUnreachablePenalty reward) changes that were made to the PrimAITE Internal repo.
See also #2826.

## Test process
Updated tests/integration_tests/game_layer/test_rewards.py.

## 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
- [X] updated the **change log**
- [X] ran **pre-commit** checks for code style
- [ ] attended to any **TO-DOs** left in the code

#2748: Port of PrimAITE Internal changes.

Related work items: #2748

CHANGELOG.md

@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 -   Added actions to change users' passwords.
 -   Added a `listen_on_ports` set in the `IOSoftware` class to enable software listening on ports in addition to the
     main port they're assigned.
+-   Added reward calculation details to AgentHistoryItem.
 
 ### Changed
 -   File and folder observations can now be configured to always show the true health status, or require scanning like before.