add full docstring coverage

[hyusap]

No description provided.

[github-actions]

Name	Stmts	Miss	Cover
honcho/__init__.py	4	0	100%
honcho/cache.py	16	11	31%
honcho/client.py	466	117	75%
honcho/schemas.py	31	3	90%
honcho/sync_client.py	466	117	75%
tests/test_async.py	360	0	100%
tests/test_sync.py	340	0	100%
TOTAL	1683	248	85%

---

Docstring Coverage

=========== Coverage for /home/runner/work/honcho/honcho/sdk/honcho/ ===========
----------------------------------- Summary ------------------------------------
| Name                     |      Total |      Miss |      Cover |      Cover% |
|--------------------------|------------|-----------|------------|-------------|
| __init__.py              |          1 |         0 |          1 |        100% |
| cache.py                 |          5 |         0 |          5 |        100% |
| client.py                |         76 |         0 |         76 |        100% |
| schemas.py               |         10 |         0 |         10 |        100% |
| sync_client.py           |         76 |         0 |         76 |        100% |
| ext/__init__.py          |          1 |         0 |          1 |        100% |
| ext/langchain.py         |          4 |         0 |          4 |        100% |
|--------------------------|------------|-----------|------------|-------------|
| TOTAL                    |        173 |         0 |        173 |      100.0% |
--------------- RESULT: PASSED (minimum: 80.0%, actual: 100.0%) ----------------