Update dependency pytest to v9

.github/workflows/python-app.yml

@@ -12,7 +12,7 @@ jobs:
 
     services:
       database:
-        image: postgres:18-alpine
+        image: postgres:17-alpine
         env:
           # password for postgres user in the Docker container
           POSTGRES_PASSWORD: postgres

pyproject.toml

@@ -34,7 +34,7 @@ build-backend = "uv_build"
 dev = [
     "flake8==7.3.*",
     "isort==7.0.*",
-    "pytest==8.4.*",
+    "pytest==9.0.*",
 ]
 
 [tool.isort]

uv.lock

@@ -113,7 +113,7 @@ requires-dist = [
 dev = [
     { name = "flake8", specifier = "==7.3.*" },
     { name = "isort", specifier = "==7.0.*" },
-    { name = "pytest", specifier = "==8.4.*" },
+    { name = "pytest", specifier = "==9.0.*" },
 ]
 
 [[package]]
@@ -378,7 +378,7 @@ wheels = [
 
 [[package]]
 name = "pytest"
-version = "8.4.2"
+version = "9.0.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "colorama", marker = "sys_platform == 'win32'" },
@@ -389,9 +389,9 @@ dependencies = [
     { name = "pygments" },
     { name = "tomli", marker = "python_full_version < '3.11'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/a3/5c/00a0e072241553e1a7496d638deababa67c5058571567b92a7eaa258397c/pytest-8.4.2.tar.gz", hash = "sha256:86c0d0b93306b961d58d62a4db4879f27fe25513d4b969df351abdddb3c30e01", size = 1519618, upload-time = "2025-09-04T14:34:22.711Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/da/1d/eb34f286b164c5e431a810a38697409cca1112cee04b287bb56ac486730b/pytest-9.0.0.tar.gz", hash = "sha256:8f44522eafe4137b0f35c9ce3072931a788a21ee40a2ed279e817d3cc16ed21e", size = 1562764, upload-time = "2025-11-08T17:25:33.34Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/a8/a4/20da314d277121d6534b3a980b29035dcd51e6744bd79075a6ce8fa4eb8d/pytest-8.4.2-py3-none-any.whl", hash = "sha256:872f880de3fc3a5bdc88a11b39c9710c3497a547cfa9320bc3c5e62fbf272e79", size = 365750, upload-time = "2025-09-04T14:34:20.226Z" },
+    { url = "https://files.pythonhosted.org/packages/72/99/cafef234114a3b6d9f3aaed0723b437c40c57bdb7b3e4c3a575bc4890052/pytest-9.0.0-py3-none-any.whl", hash = "sha256:e5ccdf10b0bac554970ee88fc1a4ad0ee5d221f8ef22321f9b7e4584e19d7f96", size = 373364, upload-time = "2025-11-08T17:25:31.811Z" },
 ]
 
 [[package]]