fix: HITL functions now properly loaded, define missing proto-get

Root cause chain:
1. proto-get was used throughout the pipeline but never defined — added
   to core-communication.org as a keyword-normalizing getf wrapper.
2. security-dispatcher.lisp was loaded by skill-initialize-all into a
   separate package, making HITL functions invisible to :passepartout.
   Fixed by adding to ASDF component list and excluding from skill loader.
3. org-id-generate was referenced from hitl-create but lives in an
   unexported skill package — replaced with uuid:make-v4-uuid.
4. uiop:string-prefix-p was called with :test keyword argument it does
   not accept — replaced with string-downcase normalization on both sides.

Also:
- Export hitl-create, hitl-approve, hitl-deny, hitl-handle-message,
  stimulus-inject from :passepartout for REPL accessibility.

passepartout.asd

@@ -11,6 +11,7 @@
                (:file "lisp/core-communication")
                (:file "lisp/core-memory")
                (:file "lisp/core-context")
+               (:file "lisp/security-dispatcher")
                (:file "lisp/core-loop-perceive")
                (:file "lisp/core-loop-reason")
                (:file "lisp/core-loop-act")