[WIP] Fix event ID handling in Bayse bot order placement

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

The Bayse bot is still returning 400 invalid event ID on order placement. Please inspect bot/bayse_client.py, bot/telegram_handler.py, and bot/main.py, then fix the event_id/market_id handling end to end.

Requirements:

1. Add debug logging in the Bayse client so every order request logs the exact event_id, market_id, and final URL path before the request is sent.
2. Make the order URL construction robust by normalizing and URL-encoding the event_id and market_id path segments before sending the request.
3. Remove any fallback that uses market_id as a substitute for event_id or vice versa. The event_id used for /pm/events/{eventId}/markets/{marketId}/orders must come from the canonical stored event context, not the market id.
4. In Telegram trade-context handling, preserve the canonical event_id across callbacks and text replies, and if event_id is missing, surface a clear error instead of silently sending a malformed order.
5. Add or update tests so the trade-context resolution keeps event_id stable and order submission uses the canonical event_id.

The bug appears to be a persistence/mismatch issue rather than a Bayse API issue. Please keep the fix minimal and targeted, but make sure it fully closes the mismatch.