passepartout: v0.5.0 File Reorganization

Extract non-core fragments using self-repair criterion:
- core-context -> symbolic-awareness (224 lines, fboundp guards in think())
- heartbeat generation -> symbolic-events (renamed events-start-heartbeat)

Rename 23 files for clarity and new naming scheme:
- 6 core: core-package, core-transport, core-pipeline,
          core-perceive, core-reason, core-act
- 13 system: symbolic-*, neuro-*, embedding-*, channel-shell
- 4 gateway: channel-cli, channel-tui-*, channel-tui-state

Utility relocations:
- markdown-strip -> programming-markdown
- plist-keywords-normalize -> programming-lisp
- cognitive-tool-prompt -> programming-tools
- VAULT-MEMORY -> security-vault
- Merge *backend-registry* into *probabilistic-backends*

Split gateway-messaging into channel-telegram/channel-signal/
channel-discord/channel-slack (4 independent skills)

Delete dead system-model.lisp (16-line wrapper)

Document self-repair criterion in DESIGN_DECISIONS

Version bump: 0.4.3 -> 0.5.0

passepartout

@@ -357,9 +357,9 @@ case "$COMMAND" in
         nohup sbcl --non-interactive \
             --eval '(load (merge-pathnames "quicklisp/setup.lisp" (user-homedir-pathname)))' \
             --eval "(ql:quickload :passepartout)" \
-            --eval "(load (format nil \"~alisp/system-model-router.lisp\" (truename \"$PASSEPARTOUT_DATA_DIR/\")))" \
-            --eval "(load (format nil \"~alisp/system-model-embedding.lisp\" (truename \"$PASSEPARTOUT_DATA_DIR/\")))" \
-            --eval "(load (format nil \"~alisp/system-model-explorer.lisp\" (truename \"$PASSEPARTOUT_DATA_DIR/\")))" \
+            --eval "(load (format nil \"~alisp/neuro-router.lisp\" (truename \"$PASSEPARTOUT_DATA_DIR/\")))" \
+            --eval "(load (format nil \"~alisp/embedding-backends.lisp\" (truename \"$PASSEPARTOUT_DATA_DIR/\")))" \
+            --eval "(load (format nil \"~alisp/neuro-explorer.lisp\" (truename \"$PASSEPARTOUT_DATA_DIR/\")))" \
             --eval '(funcall (find-symbol "MAIN" :passepartout))' \
             > "$PASSEPARTOUT_STATE_DIR/daemon.log" 2>&1 &
         echo "Waiting for port 9105..."
@@ -384,7 +384,7 @@ case "$COMMAND" in
             --eval "(push (truename \"$PASSEPARTOUT_DATA_DIR/\") asdf:*central-registry*)" \
             --eval '(ql:quickload :passepartout/tui)' \
             --eval '(in-package :passepartout)' \
-            --eval '(handler-bind ((error (lambda (c) (format t "~%CRASH: ~a~%" c) (sb-debug:print-backtrace :count 30 :stream *error-output*) (finish-output) (finish-output *error-output*) (uiop:quit 1)))) (passepartout.gateway-tui:tui-main))'
+            --eval '(handler-bind ((error (lambda (c) (format t "~%CRASH: ~a~%" c) (sb-debug:print-backtrace :count 30 :stream *error-output*) (finish-output) (finish-output *error-output*) (uiop:quit 1)))) (passepartout.channel-tui:tui-main))'
         ;;
     gateway)
         SUBCMD=$1; PLATFORM=$2; TOKEN=$3