feat: complete Dirigent rename + all TASKLIST items

- Task 1: Identity prompt now includes Discord userId
- Task 2: Added configurable schedulingIdentifier (default: ➡️)
- Task 3: Moderator handoff uses <@userId>+identifier instead of semantic messages
- Task 4: All prompts/comments/help text converted to English
- Task 5: Full project rename WhisperGate → Dirigent across all files

Breaking: config key changed from plugins.entries.whispergate to plugins.entries.dirigent
Breaking: channel policies file renamed to dirigent-channel-policies.json
Breaking: tool name changed from whispergate_tools to dirigent_tools

docs/TURN-WAKEUP-PROBLEM.md

@@ -2,7 +2,7 @@
 
 ## Context
 
-WhisperGate implements turn-based speaking for Discord group channels where multiple AI agents coexist. Only one agent (the "current speaker") is allowed to respond at a time. Others are silenced via a no-reply model override.
+Dirigent implements turn-based speaking for Discord group channels where multiple AI agents coexist. Only one agent (the "current speaker") is allowed to respond at a time. Others are silenced via a no-reply model override.
 
 ## The Problem
 
@@ -12,7 +12,7 @@ When the current speaker responds with **NO_REPLY** (decides the message is not
 
 1. A message arrives in the Discord channel
 2. OpenClaw routes it to **all** agent sessions in that channel simultaneously
-3. The WhisperGate plugin intercepts at `before_model_resolve`:
+3. The Dirigent plugin intercepts at `before_model_resolve`:
    - Current speaker → allowed to process
    - Everyone else → forced to no-reply model (message is "consumed" silently)
 4. Current speaker processes the message and returns NO_REPLY