SK-2872: clean up and pin SDK production dependencies

- Remove 5 unused/misclassified deps: python_dateutil, setuptools,
  urllib3, DateTime, coverage
- Fix broken PyJWT constraint (>=2.12 never existed; downgrade to >=2.8)
- Pin previously unpinned deps: cryptography >=44.0.2, httpx >=0.28.1
- Bump minimums to current stable: pydantic >=2.13.4,
  typing-extensions >=4.13.2, requests ~=2.32.4, python-dotenv >=1.1.0,<2
- Pin dev deps: codespell >=2.4.1, ruff >=0.9.0
- Fix main.yml: add secrets: inherit so VALID_SKYFLOW_CREDS_TEST
  is available when shared-tests.yml runs on post-merge pushes
- Mirror all install_requires changes in requirements.txt

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: saileshwar-skyflow

.github/workflows/main.yml

@@ -10,3 +10,4 @@ jobs:
     uses: ./.github/workflows/shared-tests.yml
     with:
       python-version: '3.9'
+    secrets: inherit

requirements.txt

@@ -1,12 +1,7 @@
-python_dateutil >= 2.5.3
-setuptools >= 75.3.3
-urllib3 >= 1.25.3, < 3
-pydantic >= 2
-typing-extensions >= 4.7.1
-DateTime~=5.5
-PyJWT>=2.12,<3
-requests~=2.32.3
-coverage
-cryptography
-python-dotenv>=1.0,<2
-httpx
+pydantic >= 2.13.4
+typing-extensions >= 4.13.2
+PyJWT >= 2.8, < 3
+requests ~= 2.32.4
+cryptography >= 44.0.2
+httpx >= 0.28.1
+python-dotenv >= 1.1.0, < 2

setup.py

@@ -29,23 +29,18 @@
     long_description=long_description,
     long_description_content_type='text/markdown',
     install_requires=[
-        'python_dateutil >= 2.5.3',
-    	'setuptools >= 75.3.3',
-        'urllib3 >= 1.25.3, < 3',
-        'pydantic >= 2',
-        'typing-extensions >= 4.7.1',
-        'DateTime~=5.5',
-        'PyJWT >= 2.12, < 3',
-        'requests~=2.32.3',
-        'coverage',
-        'cryptography',
-        'python-dotenv >= 1.0, < 2',
-        'httpx'
+        'pydantic >= 2.13.4',
+        'typing-extensions >= 4.13.2',
+        'PyJWT >= 2.8, < 3',
+        'requests ~= 2.32.4',
+        'cryptography >= 44.0.2',
+        'httpx >= 0.28.1',
+        'python-dotenv >= 1.1.0, < 2',
     ],
     extras_require={
         'dev': [
-            'codespell',
-            'ruff'
+            'codespell >= 2.4.1',
+            'ruff >= 0.9.0',
         ]
     },
     python_requires=">=3.9",