hermes - 💡(How to fix) Fix feat(kanban): auto-assign unassigned ready tasks in dispatcher

Problem

Tasks created without an assignee (e.g. via the dashboard) sit in the ready queue indefinitely. The dispatcher explicitly skips them:

if not row["assignee"]:
    result.skipped_unassigned.append(row["id"])
    continue

This means tasks never get worked unless someone manually assigns them — a silent failure mode.

Solution

Added auto-assign logic in dispatch_once: when a ready task has no assignee, the dispatcher picks the best profile based on:

1. Task skills (JSON array) — e.g. ["arxiv"] → researcher-specialist
2. Title keywords — e.g. "Fix Docker pipeline" → coder-specialist
3. Fallback → default profile, or the most recently active profile

Keyword-to-profile mapping:

• Research skills/keywords → researcher-specialist
• Coding/dev keywords → coder-specialist
• Communication/UI keywords → communicator
• Planning/orchestration keywords → orchestrator
• No match → default

Auto-assigned tasks are tracked in DispatchResult.auto_assigned for visibility.

Files Changed

• hermes_cli/kanban_db.py — _pick_assignee_for_task(), _set_assignee(), modified dispatch_once()