docs: architecture section, FAQ, cross-references, vault-memory update

README.md:
  - Added §1.5 'Architecture: Framework vs Project' with directory tree
    and lifecycle flow diagram
  - Added §2.5 FAQ covering coexistence, hooks, loops, multi-project
  - Updated install section already done in prior commit

AGENTS.md:
  - Added 'Script Cross-References' table mapping install.sh →
    onboard-project.sh → status.py --create-task

scripts/install-hooks.sh:
  - Updated header to reference onboard-project.sh as caller
  - Added 'Next step' line pointing to --create-task

vault-memory CONTEXT.md:
  - Updated test count (518→611)
  - Added new scripts (detect_models.py, onboard-project.sh)
  - Documented install/onboard flow and split architecture

scripts/automaton-cleanup.sh

@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
-python3 "/Users/laptran/.automaton/scripts/status.py" --cleanup-done --days 7 --project "/private/var/folders/f5/yv0dzbnx47x3yp8sc_2519gh0000gn/T/pytest-of-laptran/pytest-128/test_uninstall_via_disabled_re0"
+python3 "/Users/laptran/.automaton/scripts/status.py" --cleanup-done --days 7 --project "/private/var/folders/f5/yv0dzbnx47x3yp8sc_2519gh0000gn/T/pytest-of-laptran/pytest-129/test_uninstall_via_disabled_re0"

scripts/install-hooks.sh

@@ -3,9 +3,14 @@
 #
 # Usage: bash ~/.automaton/scripts/install-hooks.sh [project-path]
 #
+# Called automatically by onboard-project.sh. Can also be run manually
+# after framework updates to refresh hooks.
+#
 # Installs pre-commit and pre-push hooks. The pre-commit hook blocks
 # commits when no task is in implement/doc_review. The pre-push hook
 # blocks pushes in the same condition, catching --no-verify bypasses.
+#
+# Next step: python3 ~/.automaton/scripts/status.py --create-task --project .
 
 set -euo pipefail