Fix all lint issues: Dockerfiles (DL3015/DL3013/DL4006) + Ruff (173→0 errors)

Dockerfile fixes:
- edu_master/phpsessid-bot: add --no-install-recommends, pin pip versions
- edu_master/webinar-checker: pin pip versions with --no-cache-dir
- userbot: add SHELL with pipefail for pipe operations

Ruff fixes (173 → 0):
- W293/W291/W292: whitespace clean via ruff format
- N806: camelCase → snake_case (anilist, safone, hearts, flux, etc.)
- ARG001/ARG002: prefix unused params with _
- SIM115: use context managers for file I/O
- SIM117: combine nested with statements
- S608: noqa on SQL f-strings (module name is validated)
- E402/N812/N817: import fixes
- B023: pass loop variable as argument
- I001: auto-sorted imports
- syntax: fixed = vs == in dtek_notif/main.py

modules/misc/autofwd.py

@@ -140,20 +140,20 @@ async def autofwd_main(client: Client, message: Message):
     target_chats = db.get('custom.autofwd', 'chatto')
 
     if source_chats is not None and chat_id in source_chats and target_chats is not None:
-            for chat in target_chats:
+        for chat in target_chats:
+            try:
+                await message.copy(chat)
+            except Exception as e:
                 try:
-                    await message.copy(chat)
-                except Exception as e:
-                    try:
-                        await client.send_message(
-                            'me',
-                            f'Auto Forwarding Failed for Chat with id: <code>{chat_id}</code> to <code>{chat}</code>\n\n{e}',
-                        )
-                    except MessageTooLong:
-                        await client.send_message(
-                            'me',
-                            f'Auto Forwarding Failed for Chat with id: <code>{chat_id}</code> to <code>{chat}</code>, Please check logs!',
-                        )
+                    await client.send_message(
+                        'me',
+                        f'Auto Forwarding Failed for Chat with id: <code>{chat_id}</code> to <code>{chat}</code>\n\n{e}',
+                    )
+                except MessageTooLong:
+                    await client.send_message(
+                        'me',
+                        f'Auto Forwarding Failed for Chat with id: <code>{chat_id}</code> to <code>{chat}</code>, Please check logs!',
+                    )
 
 
 modules_help['autofwd'] = {