Make projects depend on templates

app/Models/Project.php

@@ -7,11 +7,13 @@ use Illuminate\Database\Eloquent\Attributes\Fillable;
 use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\Relations\HasOne;
 use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Support\Str;
 
-#[Fillable(['name', 'key', 'show_author', 'show_story_points'])]
+#[Fillable(['name', 'key', 'project_template_id', 'show_author', 'show_story_points'])]
 class Project extends Model
 {
     /** @use HasFactory<ProjectFactory> */
@@ -44,6 +46,17 @@ class Project extends Model
         return $this->morphMany(PermissionAssignment::class, 'scope');
     }
 
+    public function projectTemplate(): BelongsTo
+    {
+        return $this->belongsTo(ProjectTemplate::class, 'project_template_id');
+    }
+
+    public function baseTemplate(): HasOne
+    {
+        return $this->hasOne(ProjectTemplate::class)
+            ->where('is_published', false);
+    }
+
     public function boardColumns(): HasMany
     {
         return $this->hasMany(BoardColumn::class)