nodejs: lazy per-backend libsimplex download (#7543)

* ci: drop dlltool from nodejs libs release

* nodejs: download libsimplex into the user cache

* nodejs: load libsimplex at runtime per backend

* support bot: select db backend with --db

* python: match backend switch error text

* nodejs: download prebuilt add-on at runtime

* ci: build nodejs add-on for libs release

* calculator bot: load libs and add-on in image

* support bot: document add-on override

* nodejs: keep worker test output free of colors

* nodejs: verify sha-256 of downloaded assets

* python: pin core libs release with sha-256

* ci: add packages release script

* ci: release nodejs add-on and open release PR

* ci: publish packages after release PR

* nodejs: keep npm from building the add-on

* calculator bot: build the add-on in the image

* ci: merge package release workflows

* ci: open release PR when publishing fails

* ci: build the add-on with node-addon-api only

* ci: skip publishing in a called packages workflow

* ci: update package release actions to Node 24

* nodejs: fix receive test timeout

* ci: test packages on pull requests

* nodejs: reuse the database in the close stress test

* ci: keep failed package tests from hanging

* ci: skip preset server tests

* ci: plan package builds from the changes

* ci: test packages with a given libsimplex

* ci: test packages with libsimplex of core changes

packages/simplex-chat-python/tests/test_native_url.py

@@ -3,7 +3,7 @@ from unittest.mock import patch
 import pytest
 
 from simplex_chat._native import _libname, _libs_url, _platform_tag
-from simplex_chat._version import LIBS_VERSION
+from simplex_chat._version import LIBS_RELEASE
 
 
 @patch("sys.platform", "linux")
@@ -45,7 +45,7 @@ def test_url_sqlite(_):
     assert (
         _libs_url("sqlite")
         == "https://github.com/simplex-chat/simplex-chat-libs/releases/download/"
-        f"v{LIBS_VERSION}/simplex-chat-libs-linux-x86_64.zip"
+        f"{LIBS_RELEASE}/simplex-chat-libs-linux-x86_64.zip"
     )
 
 
@@ -54,5 +54,5 @@ def test_url_postgres(_):
     assert (
         _libs_url("postgres")
         == "https://github.com/simplex-chat/simplex-chat-libs/releases/download/"
-        f"v{LIBS_VERSION}/simplex-chat-libs-linux-x86_64-postgres.zip"
+        f"{LIBS_RELEASE}/simplex-chat-libs-linux-x86_64-postgres.zip"
     )