refactor(client_code): added some structure to the client code

CHANGELOG.md

@@ -12,6 +12,7 @@
 
 ### Fixed
 
+- [EV-1960](https://eit-oxford.atlassian.net/browse/EV-1960): refactor lib into tasks, fix mypy issues plus many more QoL fixes.
 - [EV-2139](https://eit-oxford.atlassian.net/browse/EV-2139): fix mapping csv to use correct batch and sample names with rows per sample
 
 ## 2.2.0-RC2 (2025-06-18)

pyproject.toml

@@ -28,6 +28,7 @@ dependencies = [
   "tenacity==8.2.3",
   "click>=8.1.7",
   "python-dotenv>=1.0",
+  "pytest-mock>=3.14.0",
 ]
 
 [project.scripts]
@@ -87,6 +88,9 @@ dev-dependencies = [
     "pytest-mock>=3.14.0",
 ]
 
+[[tool.mypy.overrides]]
+module = ["hostile.*", "httpx.*", "tenacity.*", "click.*", "tqdm.*", "dotenv.*"]
+ignore_missing_imports = true
 
 [tool.pytest.ini_options]
 markers = [