Telegram: support DM-ing multiple users from one notification config

[davidlahoz]

Problem

The Telegram notification feature currently accepts a single chatId, so a job can only post to one chat. It would be nice to be able to DM several users individually (for example to send the same notifications to your partner). Also that way you avoid creating a Group and adding the bot to it which migth be annoying and if missconfigured (in Telegram), might not be private.

Proposed change

Allow the existing chatId field to accept a comma-separated list of chat IDs. When more than one is provided, the adapter sends the same message to each recipient.

Example value: 123456789, 1001234567890, 987654321

• Single-value configs continue to work exactly as today (one chatId, one message).
• The per-chat Telegram rate-limit throttler is already keyed by chatId, so each recipient gets its own throttle window.
• messageThreadId, when set, applies to all recipients (same semantics; it's a property of the message format, not the user).

The approach would be better using comma instead other approaches. Just because a comma-separated list requires zero UI changes and no config migration. Users who already have a single chatId saved keep working without re-saving anything so no need for significant changes for already "deployed" instances.

[orangecoding]

Hey @davidlahoz
Next time, could you please open a feature request? I almost missed this one. I'll look into this.

[orangecoding]

There you are:
https://github.com/orangecoding/fredy/releases/tag/22.3.2