regtest: rename castle → libra in default-installed extensions

The castle LNbits extension was renamed to libra. Updates the
default-install / default-user env vars in docker-compose.dev.yml
and the fava-url pin in lnbits-entrypoint.sh (DB filename, slug,
log prefix, comments). The entrypoint script was previously
untracked — tracking it now so the rename persists for fresh
checkouts.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docker-compose.dev.yml

@@ -25,14 +25,21 @@ services:
       LNBITS_DATA_FOLDER: "./data"
       LNBITS_EXTENSIONS_PATH: "/shared"
       FAKE_WALLET_SECRET: "devsecret"
-      LNBITS_EXTENSIONS_DEFAULT_INSTALL: "lnurlp,nostrclient,nostrrelay,nostrmarket,events,castle,satmachineclient,satmachineadmin"
+      LNBITS_EXTENSIONS_DEFAULT_INSTALL: "lnurlp,nostrclient,nostrrelay,nostrmarket,events,libra,satmachineclient,satmachineadmin"
       LNBITS_ADMIN_EXTENSIONS: "nostrclient,nostrrelay,satmachineadmin"
-      LNBITS_USER_DEFAULT_EXTENSIONS: "lnurlp,nostrmarket,events,castle,satmachineclient"
+      LNBITS_USER_DEFAULT_EXTENSIONS: "lnurlp,nostrmarket,events,libra,satmachineclient"
     ports:
       - 5001:5001
     volumes:
       - ./data/lnbits-dev:/app/data
       - /home/padreug/dev/shared/extensions:/shared/extensions
+      # Bind the lnbits package so host edits are picked up on container
+      # restart without rebuilding the image. The venv at /app/.venv stays
+      # baked in.
+      - ${LNBITS_SRC:-/home/padreug/dev/lnbits/demo}/lnbits:/app/lnbits
+      # Pre-start init: pin libra's fava_url to http://fava:5000.
+      - ./lnbits-entrypoint.sh:/usr/local/bin/lnbits-entrypoint.sh:ro
+    command: ["/usr/local/bin/lnbits-entrypoint.sh"]
 
   fava:
     hostname: fava