Post meeting summary to designated Discord channel

[mohi-devhub]

Scope:

• Configure summary output channel
• Post formatted summary message
• Handle long summaries (chunk messages if needed)

[hey-granth]

hey @mohi-devhub
i'd like to work on this.

Proposed implementation:

1. Configuration: Add SUMMARY_CHANNEL_ID to .env.example and environment parsing logic.
2. Chunking Logic: Implement a helper function in bot/main.py to divide the summary string into <=1900 character blocks to respect Discord API constraints.
3. Transmission: Create an asynchronous post_summary function that retrieves the designated discord.TextChannel using the configured ID and sequentially dispatches the message chunks.
4. Command Integration: Inject the post_summary execution block into the end_meeting command directly after the recording termination and summary generation phases.