fix(bot): guild sync dev (discord.Object) + tolerant des echecs de sync

.env.example

@@ -1,6 +1,7 @@
 DISCORD_TOKEN=your_bot_token_here
 APPLICATION_ID=your_application_id_here
 DEV=1
+DEV_GUILD_IDS=optional_test_guild_id
 FORGEJO_URL=https://your-forgejo-instance.com
 FORGEJO_OWNER=your_forgejo_owner
 FORGEJO_REPO=your_repo_name

bot.py

@@ -31,9 +31,16 @@ class VisionBot(commands.Bot):
         if config.DEV and DEV_GUILD_IDS:
             logger.info(f"Mode DEV — sync des commands sur les guilds: {DEV_GUILD_IDS}")
             for guild_id in DEV_GUILD_IDS:
-                self.tree.copy_global_to(guild=guild_id)
-                await self.tree.sync(guild=guild_id)
-                logger.info(f"  ✓ Sync guild {guild_id}")
+                guild = discord.Object(id=guild_id)
+                self.tree.copy_global_to(guild=guild)
+                try:
+                    await self.tree.sync(guild=guild)
+                    logger.info(f"  ✓ Sync guild {guild_id}")
+                except discord.HTTPException as e:
+                    logger.warning(
+                        f"  ✗ Sync guild {guild_id} impossible ({e}). "
+                        f"Le bot est-il invité sur ce serveur ?"
+                    )
         else:
             logger.info("Mode PROD — sync global des slash commands...")
             await self.tree.sync()