Move reaction emoji to pre-activation job for immediate user feedback

[Copilot]

Reactions (👀 eyes, 🚀 rocket, etc.) were added in the activation job, which runs after all pre-activation checks (membership, stop-time, skip-if-match). Users saw no progress indicator during these checks, creating the impression that nothing was happening.

Changes

Architecture: Split reaction/comment logic into two phases

• Pre-activation: Add reaction immediately after setup (instant feedback)
• Activation: Add comment with workflow run URL (requires run context)

New scripts:

• add_reaction.cjs - Adds reactions only (all event types: issues, PRs, discussions)
• add_workflow_run_comment.cjs - Creates comment with workflow URL

Compiler modifications:

• buildPreActivationJob(): Add reaction step after setup, grant write permissions (issues, pull-requests, discussions)
• buildActivationJob(): Remove reaction step, keep comment creation only

Test updates: All reaction-related tests updated to expect reactions in pre-activation job

Example workflow behavior

pre_activation:
  steps:
    - name: Setup
    - name: Add eyes reaction for immediate feedback  # ← New: instant feedback
    - name: Check team membership
    - name: Check stop-time

activation:
  needs: [pre_activation]
  steps:
    - name: Add comment with workflow run link  # ← Modified: comment only

Users now see the reaction immediately when workflow triggers, before any validation checks run.

Original prompt

Why do on eyes reaction to triggering only happen in the activation and not in the pre-activation step or even immediately? This makes the user think that there is no progress/work being done.

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