Added codespell CI job and fixed existing spelling issues.

uv.lock

@@ -220,6 +220,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/0a/4c/925909008ed5a988ccbb72dcc897407e5d6d3bd72410d69e051fc0c14647/charset_normalizer-3.4.4-py3-none-any.whl", hash = "sha256:7a32c560861a02ff789ad905a2fe94e3f840803362c84fecf1851cb4cf3dc37f", size = 53402, upload-time = "2025-10-14T04:42:31.76Z" },
 ]
 
+[[package]]
+name = "codespell"
+version = "2.4.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/15/e0/709453393c0ea77d007d907dd436b3ee262e28b30995ea1aa36c6ffbccaf/codespell-2.4.1.tar.gz", hash = "sha256:299fcdcb09d23e81e35a671bbe746d5ad7e8385972e65dbb833a2eaac33c01e5", size = 344740, upload-time = "2025-01-28T18:52:39.411Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/20/01/b394922252051e97aab231d416c86da3d8a6d781eeadcdca1082867de64e/codespell-2.4.1-py3-none-any.whl", hash = "sha256:3dadafa67df7e4a3dbf51e0d7315061b80d265f9552ebd699b3dd6834b47e425", size = 344501, upload-time = "2025-01-28T18:52:37.057Z" },
+]
+
 [[package]]
 name = "colorama"
 version = "0.4.6"
@@ -840,6 +849,7 @@ dependencies = [
 
 [package.dev-dependencies]
 dev = [
+    { name = "codespell" },
     { name = "freezegun" },
     { name = "mypy" },
     { name = "pip-audit" },
@@ -861,6 +871,7 @@ requires-dist = [
 
 [package.metadata.requires-dev]
 dev = [
+    { name = "codespell", specifier = ">=2.4.1" },
     { name = "freezegun", specifier = ">=1.5.5" },
     { name = "mypy", specifier = ">=1.18.1" },
     { name = "pip-audit", specifier = ">=2.10.0" },