Show parking capacities in air wing config.

This does show the theoretical parking use of full squadrons even when
the new rules are not enabled. Since limits can be enabled manually
later in the game, it's still useful information, even if it's a bit
misleading.

https://github.com/dcs-liberation/dcs_liberation/issues/2910

game/squadrons/squadron.py

@@ -5,7 +5,8 @@ import random
 from collections.abc import Iterable
 from dataclasses import dataclass, field
 from datetime import datetime
-from typing import Optional, Sequence, TYPE_CHECKING
+from typing import Optional, Sequence, TYPE_CHECKING, Any
+from uuid import uuid4, UUID
 
 from faker import Faker
 
@@ -13,6 +14,7 @@ from game.ato import Flight, FlightType, Package
 from game.settings import AutoAtoBehavior, Settings
 from .pilot import Pilot, PilotStatus
 from ..db.database import Database
+from ..savecompat import has_save_compat_for
 from ..utils import meters
 
 if TYPE_CHECKING:
@@ -26,6 +28,8 @@ if TYPE_CHECKING:
 
 @dataclass
 class Squadron:
+    id: UUID = field(init=False, default_factory=uuid4)
+
     name: str
     nickname: Optional[str]
     country: str
@@ -61,21 +65,24 @@ class Squadron:
     untasked_aircraft: int = field(init=False, hash=False, compare=False, default=0)
     pending_deliveries: int = field(init=False, hash=False, compare=False, default=0)
 
+    @has_save_compat_for(7)
+    def __setstate__(self, state: dict[str, Any]) -> None:
+        if "id" not in state:
+            state["id"] = uuid4()
+        self.__dict__.update(state)
+
     def __str__(self) -> str:
         if self.nickname is None:
             return self.name
         return f'{self.name} "{self.nickname}"'
 
     def __hash__(self) -> int:
-        return hash(
-            (
-                self.name,
-                self.nickname,
-                self.country,
-                self.role,
-                self.aircraft,
-            )
-        )
+        return hash(self.id)
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Squadron):
+            return False
+        return self.id == other.id
 
     @property
     def player(self) -> bool: