bootstrap: fix rule syntax, enable metrics+coach definitions

Align coulomb ActivityDefinition rules with activity-core path syntax
(context.p.* / {context.p.*}). Enable hourly-metrics-optimize and
hourly-coach-orientation; record first E2E cycle in bootstrap-log.

activity-definitions/hourly-coach-orientation.md

@@ -1,7 +1,7 @@
 ---
 id: coulomb-hourly-coach-orientation
 name: Hourly Kaizen Coach Orientation (coulomb-loop bootstrap)
-enabled: false
+enabled: true
 owner: coulomb-loop
 governance: coulomb_social
 status: proposed
@@ -25,14 +25,14 @@ context_sources:
 id: run-hourly-coach
 for_each: context.scheduled_runs
 bind_as: r
-condition: 'r.agent == "coach" and r.enabled == true'
+condition: 'context.r.agent == "coach" and context.r.enabled'
 action:
-  task_template: "Hourly coach orientation: {{r.repo}}"
+  task_template: "Hourly coach orientation: {context.r.repo}"
   description: |
-    {{r.prepare_command}}
+    {context.r.prepare_command}
     Load agents/agent-coach.md, execute coach synthesis.
     Session close: kaizen-agentic metrics record coach --success --time <s> --quality <0-1>
-  target_repo: "{{r.repo}}"
+  target_repo: context.r.repo
   priority: medium
   labels: ["kaizen", "agent-run", "coach", "coulomb-loop", "bootstrap"]
 ```