fix: Fix mypy 1.19 type errors

Author: Your Name

httpstan/schemas.py

@@ -103,19 +103,19 @@ class CreateFitRequest(marshmallow.Schema):
     init = fields.Nested(Data(), missing={})
     random_seed = fields.Integer(validate=validate.Range(min=0))
     chain = fields.Integer(validate=validate.Range(min=0))
-    init_radius = fields.Number()
+    init_radius: fields.Number = fields.Number()
     num_warmup = fields.Integer(validate=validate.Range(min=0))
     num_samples = fields.Integer(validate=validate.Range(min=0))
     num_thin = fields.Integer(validate=validate.Range(min=0))
     save_warmup = fields.Boolean()
     refresh = fields.Integer(validate=validate.Range(min=0))
-    stepsize = fields.Number()
-    stepsize_jitter = fields.Number()
+    stepsize: fields.Number = fields.Number()
+    stepsize_jitter: fields.Number = fields.Number()
     max_depth = fields.Integer(validate=validate.Range(min=0))
-    delta = fields.Number()
-    gamma = fields.Number()
-    kappa = fields.Number()
-    t0 = fields.Number()
+    delta: fields.Number = fields.Number()
+    gamma: fields.Number = fields.Number()
+    kappa: fields.Number = fields.Number()
+    t0: fields.Number = fields.Number()
     init_buffer = fields.Integer(validate=validate.Range(min=0))
     term_buffer = fields.Integer(validate=validate.Range(min=0))
     window = fields.Integer(validate=validate.Range(min=0))

setup.cfg

@@ -10,3 +10,8 @@ exclude=.venv,.git,dist,doc,*lib/python*,*egg,build,httpstan/include
 ignore_missing_imports = True
 disallow_untyped_defs = True
 exclude=httpstan/include
+
+# doc/conf.py is Sphinx configuration, not part of the package; it is pulled in
+# via `from doc.conf import version` in httpstan/openapi.py. Don't type-check.
+[mypy-doc.conf]
+ignore_errors = True