chore: add python-dotenv dependency

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pyproject.toml

@@ -12,6 +12,7 @@ dependencies = [
     "httpx>=0.28.1",
     "httpx-ws>=0.9.0",
     "pydantic>=2.12.5",
+    "python-dotenv>=1.2.2",
 ]
 
 [build-system]

uv.lock

@@ -546,6 +546,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/e5/35/f8b19922b6a25bc0880171a2f1a003eaeb93657475193ab516fd87cac9da/pytest_asyncio-1.3.0-py3-none-any.whl", hash = "sha256:611e26147c7f77640e6d0a92a38ed17c3e9848063698d5c93d5aa7aa11cebff5", size = 15075, upload-time = "2025-11-10T16:07:45.537Z" },
 ]
 
+[[package]]
+name = "python-dotenv"
+version = "1.2.2"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/82/ed/0301aeeac3e5353ef3d94b6ec08bbcabd04a72018415dcb29e588514bba8/python_dotenv-1.2.2.tar.gz", hash = "sha256:2c371a91fbd7ba082c2c1dc1f8bf89ca22564a087c2c287cd9b662adde799cf3", size = 50135, upload-time = "2026-03-01T16:00:26.196Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/0b/d7/1959b9648791274998a9c3526f6d0ec8fd2233e4d4acce81bbae76b44b2a/python_dotenv-1.2.2-py3-none-any.whl", hash = "sha256:1d8214789a24de455a8b8bd8ae6fe3c6b69a5e3d64aa8a8e5d68e694bbcb285a", size = 22101, upload-time = "2026-03-01T16:00:25.09Z" },
+]
+
 [[package]]
 name = "pytokens"
 version = "0.4.1"
@@ -685,6 +694,7 @@ dependencies = [
     { name = "httpx" },
     { name = "httpx-ws" },
     { name = "pydantic" },
+    { name = "python-dotenv" },
 ]
 
 [package.dev-dependencies]
@@ -703,6 +713,7 @@ requires-dist = [
     { name = "httpx", specifier = ">=0.28.1" },
     { name = "httpx-ws", specifier = ">=0.9.0" },
     { name = "pydantic", specifier = ">=2.12.5" },
+    { name = "python-dotenv", specifier = ">=1.2.2" },
 ]
 
 [package.metadata.requires-dev]