Fix deprecated forward_from_chat and add missing get_client import

Migrate indexing to STRING_SESSIONS only - use get_chat_history for full channel access

Allow sending message/link after /index channel_id to specify starting point

Fix indexing: filter None messages, stop on empty batches, find actual last message ID

Fix iter_messages - use get_messages in batches for Pyrogram bot compatibility

Fix channel type detection for indexing - handle enum and string formats

Implement Auto-Filter-Bot style indexing with iter_messages

deleted session

Initial commit for beta-tgdrive