Refactor Docker Compose examples and plugins, add pytest tests

- Adjusted Compose files to build images locally instead of pulling.
- Simplified examples by removing `/etc/hosts` entry instructions.
- Enhanced `cloudflare.py` plugin with a configurable log format.
- Improved `generate-keys.sh` for portability using `$SCRIPT_DIR`.
- Added end-to-end tests for Compose examples using pytest.

uv.lock

@@ -366,6 +366,8 @@ dependencies = [
 
 [package.dev-dependencies]
 dev = [
+    { name = "cryptography" },
+    { name = "pyjwt" },
     { name = "pytest" },
     { name = "pytest-cov" },
     { name = "ruff" },
@@ -385,6 +387,8 @@ requires-dist = [
 
 [package.metadata.requires-dev]
 dev = [
+    { name = "cryptography", specifier = ">=41.0.0" },
+    { name = "pyjwt", specifier = ">=2.8.0" },
     { name = "pytest", specifier = ">=9.0.2" },
     { name = "pytest-cov", specifier = ">=4.1.0" },
     { name = "ruff", specifier = ">=0.1.0" },
@@ -596,6 +600,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/c7/21/705964c7812476f378728bdf590ca4b771ec72385c533964653c68e86bdc/pygments-2.19.2-py3-none-any.whl", hash = "sha256:86540386c03d588bb81d44bc3928634ff26449851e99741617ecb9037ee5ec0b", size = 1225217, upload-time = "2025-06-21T13:39:07.939Z" },
 ]
 
+[[package]]
+name = "pyjwt"
+version = "2.11.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/5c/5a/b46fa56bf322901eee5b0454a34343cdbdae202cd421775a8ee4e42fd519/pyjwt-2.11.0.tar.gz", hash = "sha256:35f95c1f0fbe5d5ba6e43f00271c275f7a1a4db1dab27bf708073b75318ea623", size = 98019, upload-time = "2026-01-30T19:59:55.694Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/6f/01/c26ce75ba460d5cd503da9e13b21a33804d38c2165dec7b716d06b13010c/pyjwt-2.11.0-py3-none-any.whl", hash = "sha256:94a6bde30eb5c8e04fee991062b534071fd1439ef58d2adc9ccb823e7bcd0469", size = 28224, upload-time = "2026-01-30T19:59:54.539Z" },
+]
+
 [[package]]
 name = "pyopenssl"
 version = "25.3.0"