[feature request] Build-level `autoDeployPaths` for push-triggered auto deploy

[AntonRatnick]

Idea

Introduce an optional environment.autoDeployPaths list in lifecycle.yaml to limit
push-triggered redeploys to relevant file changes.

autoDeploy stays the main toggle.
autoDeployPaths is an additional include filter for push events only.

Expected behavior

• If autoDeploy is true and autoDeployPaths is set:
  • redeploy only when changed files (from push before..after) match at least one path
    pattern.
• If no match, skip push-triggered redeploy.
• If changed-files lookup fails, fail open (keep current behavior).
• If there are failed deploys, keep current priority behavior (still redeploy).
• Manual/API/comment-triggered redeploy flows are unchanged.

Scope

• Add compare-based changed-files helper.
• Add path matching utility (glob include match).
• Add config validation for autoDeployPaths.
• Wire gate into push webhook flow.

Acceptance criteria

• Matching path change triggers push redeploy.
• Non-matching change does not trigger push redeploy.
• Missing autoDeployPaths keeps current behavior.
• Retrieval failures do not block current behavior.