Refactor: Move equipment price and mandatory status to Categorie relationship

- Created CategorieEquipement entity to act as a join table between Category and Equipment.
- Moved 'obligatoire' and 'prix' (formerly prixContribution) fields from Equipement to the new CategorieEquipement entity.
- Added Flyway migrations V14 and V15 to update the database schema and migrate existing data.
- Updated Categorie UI to use a select dropdown and price input for managing category-specific equipment configurations.
- Replaced 'equipement.obligatoire' and 'equipement.prixContribution' calls with their new category-level equivalents in logic and templates.
- Updated pricing calculation in Licence entity to source prices dynamically from the Categorie configuration.
- Updated Dotation generation logic to sync with category requirements automatically.

as-talange-web/src/main/java/com/astalange/web/controller/EquipementController.java

@@ -1,7 +1,9 @@
 package com.astalange.web.controller;
 
 import com.astalange.core.entity.Equipement;
+import com.astalange.core.entity.Saison;
 import com.astalange.core.repository.EquipementRepository;
+import com.astalange.core.repository.SaisonRepository;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.Model;
 import org.springframework.web.bind.annotation.*;
@@ -11,9 +13,11 @@ import org.springframework.web.bind.annotation.*;
 public class EquipementController {
 
     private final EquipementRepository equipementRepository;
+    private final SaisonRepository saisonRepository;
 
-    public EquipementController(EquipementRepository equipementRepository) {
+    public EquipementController(EquipementRepository equipementRepository, SaisonRepository saisonRepository) {
         this.equipementRepository = equipementRepository;
+        this.saisonRepository = saisonRepository;
     }
 
     @GetMapping
@@ -38,8 +42,15 @@ public class EquipementController {
 
     @PostMapping
     public String saveEquipement(@ModelAttribute("equipement") Equipement equipement) {
-        if (equipement.getObligatoire() == null) {
-            equipement.setObligatoire(false);
+
+        if (equipement.getId() == null) {
+            Saison activeSaison = saisonRepository.findByEstActiveTrue()
+                    .orElseThrow(() -> new IllegalStateException("Aucune saison active trouvée"));
+            equipement.setSaison(activeSaison);
+        } else {
+            Equipement existing = equipementRepository.findById(equipement.getId())
+                    .orElseThrow(() -> new IllegalArgumentException("Invalid equipment ID: " + equipement.getId()));
+            equipement.setSaison(existing.getSaison());
         }
         equipementRepository.save(equipement);
         return "redirect:/equipements";