Refactor Discord member statistics handling and remove unused components

- Removed the `guild_member_stats` table and related logic from the database and models, as well as the associated webapp routes and templates.
- Cleaned up the Discord bot initialization by eliminating unused imports and functions related to member statistics.
- Updated logging configuration in `run-web.py` to streamline the startup process and improve thread management.

run-web.py

@@ -2,7 +2,6 @@ import locale
 import logging
 import threading
 import os
-import time
 from logging.handlers import RotatingFileHandler
 
 from webapp import webapp
@@ -38,25 +37,9 @@ if __name__ == '__main__':
     handlers.append(file_handler)
     logging.basicConfig(level=logging.INFO, handlers=handlers)
 
-    # Éviter les doublons de lignes discord (ex. discord.http sans [thread] puis avec) :
-    # discord.py peut attacher des handlers avant basicConfig ; on ne garde que la propagation vers la racine.
-    for _name in (
-        'discord',
-        'discord.client',
-        'discord.http',
-        'discord.gateway',
-        'discord.state',
-        'discord.webhook',
-    ):
-        _lg = logging.getLogger(_name)
-        _lg.handlers.clear()
-        _lg.propagate = True
-
     # Calmer les logs verbeux de certaines libs si besoin
     logging.getLogger('werkzeug').setLevel(logging.WARNING)
     logging.getLogger('discord').setLevel(logging.WARNING)
-    # 429 : en-têtes X-RateLimit-* (voir discordbot/rate_limit_logging.py + doc Discord rate limits)
-    logging.getLogger('discord.ratelimit_headers').setLevel(logging.WARNING)
 
     # Hook exceptions non-capturées (threads inclus)
     def _log_uncaught(exc_type, exc, tb):
@@ -70,15 +53,12 @@ if __name__ == '__main__':
 
     locale.setlocale(locale.LC_TIME, 'fr_FR.UTF-8')
 
-    t_discord = threading.Thread(target=start_discord_bot, name='discord-bot')
-    t_web = threading.Thread(target=start_server, name='web-server')
-    t_twitch = threading.Thread(target=start_twitch_bot, name='twitch-bot')
+    jobs = []
+    jobs.append(threading.Thread(target=start_discord_bot, name='discord-bot'))
+    jobs.append(threading.Thread(target=start_server, name='web-server'))
+    jobs.append(threading.Thread(target=start_twitch_bot, name='twitch-bot'))
 
-    # Démarrer Discord en premier : le 429 sur GET /users/@me est souvent un pic au login ;
-    # lancer Waitress + Twitch quelques secondes après évite la concurrence au tout début.
-    t_discord.start()
-    time.sleep(3)
-    t_web.start()
-    t_twitch.start()
-    for job in (t_discord, t_web, t_twitch):
+    for job in jobs:
+        job.start()
+    for job in jobs:
         job.join()