fix: remove remaining action-agent references from docs and configs

- Remove action-agent card from site/docs/architecture.html
- Remove action/ directory line from architecture.html
- Update formula comments to reference dispatcher instead of action-agent
- Remove action/action.log from log scan loops in preflight.sh and collect-metrics.sh
- Remove action from find command in agent-smoke.sh

formulas/run-rent-a-human.toml

@@ -5,7 +5,7 @@
 # the action and notifies the human for one-click copy-paste execution.
 #
 # Trigger: action issue created by planner or any formula.
-# The action-agent picks up the issue, executes these steps, writes a draft
+# The dispatcher picks up the issue, executes these steps, writes a draft
 # to vault/outreach/{platform}/drafts/, notifies the human via the forge,
 # and closes the issue.
 #