Refactor runtime bootstrap and ship control flows

apps/backend/PlayerFaction/Simulation/PlayerStateStore.cs

@@ -0,0 +1,26 @@
+namespace SpaceGame.Api.PlayerFaction.Simulation;
+
+public sealed class PlayerStateStore : IPlayerStateStore
+{
+    private readonly Dictionary<string, PlayerFactionRuntime> _playerFactions = new(StringComparer.Ordinal);
+
+    public bool TryGetPlayerFaction(string playerId, out PlayerFactionRuntime playerFaction) =>
+      _playerFactions.TryGetValue(playerId, out playerFaction!);
+
+    public PlayerFactionRuntime GetOrAddPlayerFaction(string playerId, Func<PlayerFactionRuntime> factory)
+    {
+        if (_playerFactions.TryGetValue(playerId, out var existing))
+        {
+            return existing;
+        }
+
+        var created = factory();
+        _playerFactions[playerId] = created;
+        return created;
+    }
+
+    public IReadOnlyCollection<PlayerFactionRuntime> GetPlayerFactions() =>
+      _playerFactions.Values.ToList();
+
+    public void Clear() => _playerFactions.Clear();
+}