refactor: migrate webhook queue to RQ with updated configuration

backend/uv.lock

@@ -730,7 +730,6 @@ dependencies = [
     { name = "python-dotenv" },
     { name = "redis" },
     { name = "rq" },
-    { name = "rq-scheduler" },
     { name = "sqlalchemy", extra = ["asyncio"] },
     { name = "sqlmodel" },
     { name = "sse-starlette" },
@@ -775,7 +774,6 @@ requires-dist = [
     { name = "python-dotenv", specifier = "==1.2.1" },
     { name = "redis", specifier = "==6.3.0" },
     { name = "rq", specifier = "==2.6.0" },
-    { name = "rq-scheduler", specifier = "==0.14.0" },
     { name = "ruff", marker = "extra == 'dev'", specifier = "==0.15.0" },
     { name = "sqlalchemy", extras = ["asyncio"], specifier = "==2.0.46" },
     { name = "sqlmodel", specifier = "==0.0.32" },
@@ -1195,21 +1193,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/cc/66/6cf141584526e3ed5b57a194e09cbdf7058334bd3926bb3f96e2453cf053/rq-2.6.0-py3-none-any.whl", hash = "sha256:be5ccc0f0fc5f32da0999648340e31476368f08067f0c3fce6768d00064edbb5", size = 112533, upload-time = "2025-09-06T03:15:09.894Z" },
 ]
 
-[[package]]
-name = "rq-scheduler"
-version = "0.14.0"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "crontab" },
-    { name = "freezegun" },
-    { name = "python-dateutil" },
-    { name = "rq" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/a0/4e/977bbcc1f3b25ed9ea60ec968b13f7147661defe5b2f9272b44fdb1c5549/rq-scheduler-0.14.0.tar.gz", hash = "sha256:2d5a14a1ab217f8693184ebaa1fe03838edcbc70b4f76572721c0b33058cd023", size = 16582, upload-time = "2024-10-29T13:30:32.641Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/bb/d0/28cedca9f3b321f30e69d644c2dcd7097ec21570ec9606fde56750621300/rq_scheduler-0.14.0-py2.py3-none-any.whl", hash = "sha256:d4ec221a3d8c11b3ff55e041f09d9af1e17f3253db737b6b97e86ab20fc3dc0d", size = 13874, upload-time = "2024-10-29T13:30:30.449Z" },
-]
-
 [[package]]
 name = "ruff"
 version = "0.15.0"