Comment-based wake-up (G-1 fix)

Source: tests/bdd/features/watcher_comments.feature

Feature: Comment-based wake-up (G-1 fix)
  The watcher detects new comments on in_progress beads
  and wakes the correct agents — excluding the commenter.

  @bdd
  Scenario: QUESTION on claimed bead wakes labeled agent
    Given a fresh beads environment with 6 agents
    And "priya" creates a bead "Implement auth" labeled "forge,priya"
    And "forge" claims the bead
    And the watcher has scanned the initial state
    When "forge" comments "QUESTION: OAuth2 or SAML?"
    And the watcher runs comment tracking
    Then the watcher would wake "priya" for the bead
    And the watcher would NOT wake "forge" for the bead

  @bdd
  Scenario: Comment by non-labeled agent wakes all labeled agents
    Given a fresh beads environment with 6 agents
    And "priya" creates a bead "Review this" labeled "forge,priya"
    And "forge" claims the bead
    And the watcher has scanned the initial state
    When "main-agent" comments "FROM HUMAN: Please prioritize this"
    And the watcher runs comment tracking
    Then the watcher would wake "forge" for the bead
    And the watcher would wake "priya" for the bead

  @bdd
  Scenario: First run seeds state without dispatching
    Given a fresh beads environment with 6 agents
    And "priya" creates a bead "New task" labeled "forge"
    And "forge" comments "QUESTION: What is the priority?"
    When the watcher runs comment tracking for the first time
    Then no wake actions are produced
    And the state records the current comment count