Document imported heartbeat defaults

Co-Authored-By: Paperclip <noreply@paperclip.ing>

doc/SPEC-implementation.md

@@ -868,6 +868,7 @@ Export/import behavior in V1:
   - create a new company
   - import into an existing company
 - import recreates exported project workspaces and remaps portable workspace keys back to target-local workspace ids
+- import forces imported agent timer heartbeats off so packages never start scheduled runs implicitly
 - import supports collision strategies: `rename`, `skip`, `replace`
 - import supports preview (dry-run) before apply
 - GitHub imports warn on unpinned refs instead of blocking

docs/guides/board-operator/importing-and-exporting.md

@@ -140,6 +140,8 @@ The preview shows:
 - **Env inputs** — Environment variables that may need values after import
 - **Warnings** — Potential issues like missing skills or unresolved references
 
+Imported agents always land with timer heartbeats disabled. Assignment/on-demand wake behavior from the package is preserved, but scheduled runs stay off until a board operator re-enables them.
+
 ### Common Workflows
 
 **Clone a company template from GitHub:**