feat(preprod): contrats fonctionnels, réputation factions, gating tech-tree & shop

- RequestPlayerContracts: renvoie les vrais contrats actifs + job boards du joueur
  (peuplement initial des boards vides) au lieu d'une liste hardcodée.
- RequestFactionProgression: renvoie la réputation réelle des 3 factions (au lieu de 0).
- StartTechTreeNodeUpgradeClient: dependency check PlayerQuarterLevelRequired.
- PurchaseWeaponShopItem: critère de déblocage par contrat (UnlockData.ContractLockPurchase).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/Prospect.Server.Api/Services/CloudScript/Functions/StartTechTreeNodeUpgradeClient.cs

@@ -54,7 +54,7 @@ public class StartTechTreeNodeUpgradeClient : ICloudScriptFunction<FYStartTechTr
 
         var userData = await _userDataService.FindAsync(
             userId, userId,
-            new List<string>{"TechTreeNodeData", "Balance", "Inventory"}
+            new List<string>{"TechTreeNodeData", "Balance", "Inventory", "PlayerQuartersLevel"}
         );
 
         var userTechTree = JsonSerializer.Deserialize<UserTechTreeNodeData>(userData["TechTreeNodeData"].Value);
@@ -79,7 +79,15 @@ public class StartTechTreeNodeUpgradeClient : ICloudScriptFunction<FYStartTechTr
         var techTreeNodeData = techTreeNodes[request.NodeID];
         var nextTreeNodeLevel = techTreeNodeData.PerkLevels[currentLevel]; // Tech tree node levels start from 0
 
-        // TODO: Dependency check
+        // Dependency check: the player's quarters must be high enough to unlock this node.
+        var playerQuarters = JsonSerializer.Deserialize<FYPlayerQuarterStatus>(userData["PlayerQuartersLevel"].Value);
+        if (playerQuarters != null && playerQuarters.Level < techTreeNodeData.PlayerQuarterLevelRequired) {
+            return new FYStartTechTreeNodeUpgradeClientResult
+            {
+                UserID = userId,
+                Error = $"Requires player quarters level {techTreeNodeData.PlayerQuarterLevelRequired}",
+            };
+        }
 
         // Validate price
         // TODO: Refactor