Merged PR 349: #2511 - Upgraded pydantic to version 2.7.0

## Summary
- Upgraded pydantic to version 2.7.0.
- Added ipywidgets to the dependencies (for #2300)

## Test process
N/A

## Checklist
- [X] PR is linked to a **work item**
- [X] **acceptance criteria** of linked ticket are met
- [X] 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
- [X] updated the **change log**
- [X] ran **pre-commit** checks for code style
- [ ] attended to any **TO-DOs** left in the code

#2511 - Upgraded pydantic to version 2.7.0. Added ipywidgets to the dependencies (for #2300)

Related work items: #2300, #2511

src/primaite/game/agent/observations/observations.py

@@ -1,6 +1,6 @@
 """Manages the observation space for the agent."""
 from abc import ABC, abstractmethod
-from typing import Any, Dict, Iterable, Type
+from typing import Any, Dict, Iterable, Optional, Type, Union
 
 from gymnasium import spaces
 from gymnasium.core import ObsType
@@ -9,7 +9,7 @@ from pydantic import BaseModel, ConfigDict
 from primaite import getLogger
 
 _LOGGER = getLogger(__name__)
-WhereType = Iterable[str | int] | None
+WhereType = Optional[Iterable[Union[str, int]]]
 
 
 class AbstractObservation(ABC):

src/primaite/game/agent/rewards.py

@@ -26,7 +26,7 @@ the structure:
 ```
 """
 from abc import abstractmethod
-from typing import Callable, Dict, Iterable, List, Optional, Tuple, Type, TYPE_CHECKING
+from typing import Callable, Dict, Iterable, List, Optional, Tuple, Type, TYPE_CHECKING, Union
 
 from typing_extensions import Never
 
@@ -37,7 +37,7 @@ if TYPE_CHECKING:
     from primaite.game.agent.interface import AgentActionHistoryItem
 
 _LOGGER = getLogger(__name__)
-WhereType = Iterable[str | int] | None
+WhereType = Optional[Iterable[Union[str, int]]]
 
 
 class AbstractReward:

src/primaite/simulator/system/applications/database_client.py

@@ -236,7 +236,7 @@ class DatabaseClient(Application):
 
         if not connection_id:
             msg = "Cannot run sql query, could not establish connection with the server."
-            self.parent.sys_log(msg)
+            self.parent.sys_log.error(msg)
             return False
 
         uuid = str(uuid4())