Docstrings missing type or annotation

[jhkennedy]

When we build the API reference for hyp3-docs, mkdocstrings complains about some of the hyp3_sdk docstrings:```[tasklist]

• WARNING - griffe: hyp3_sdk/jobs.py:211: Empty returns section at line 1
• WARNING - griffe: hyp3_sdk/jobs.py:233: Empty returns section at line 5
• WARNING - griffe: hyp3_sdk/jobs.py:220: Empty returns section at line 1
• WARNING - griffe: hyp3_sdk/jobs.py:120: Empty returns section at line 5
• WARNING - griffe: hyp3_sdk/util.py:113: No type or annotation for parameter 'chunk_size'
• WARNING - griffe: hyp3_sdk/util.py:114: No type or annotation for parameter 'retries'
• WARNING - griffe: hyp3_sdk/util.py:115: No type or annotation for parameter 'backoff_factor'