chore: regenerate Python SDK with typed query params, response models, datetime, hoisted nested types

[calvin-archastro]

Summary

Regenerated the SDK against the four Python typing improvements in ArchAstro/archastro-openapi#14. Held as a draft until that PR merges and a generator release ships (0.1.6) — at which point I'll re-run `./scripts/regenerate_sdk.sh` from a clean state so the diff is reproducible from npm.

What changes

Inputs (TypedDicts): every nested inline object now has a real type. ACL grants, profile pictures, thread attributes, etc. used to be `dict[str, object] | None` — now they're concrete classes:

```python
class TeamCreateInputAclAddItem(TypedDict, total=False):
actions: Required[list[str]]
principal: str | None
principal_type: Required[str]

class TeamCreateInputAcl(TypedDict, total=False):
add: list[TeamCreateInputAclAddItem] | None
remove: list[TeamCreateInputAclRemoveItem] | None

class TeamCreateInput(TypedDict, total=False):
name: Required[str]
acl: TeamCreateInputAcl | None
metadata: dict[str, object] | None # genuinely freeform — kept as-is
```

Responses (Pydantic models): ~30 ops that returned `dict[str, object]` because their response was inline now produce typed models. Callers go from `result["data"][0]["name"]` (untyped) to `result.data[0].name` (full IDE help).

Query params: drop `**params` for typed kw-only args.

```python

before

async def list(self, **params) -> dict[str, object]: ...

after

async def list(
self, *, page: int | None = None, page_size: int | None = None
) -> TeamListResponse: ...
```

The call site builds the query dict conditionally, so `None` kwargs never hit the wire as `?key=null`.

Datetime fields: every `created_at` / `updated_at` / etc. across `types/*.py` is now `datetime | None` instead of `str | None`. Pydantic v2 already auto-parsed the ISO strings at runtime, so behavior is unchanged — only the static types get more accurate.

Verified

• `uv run pytest tests/test_http_client.py src/archastro/phx_channel/tests/test_unit.py tests/harness` — 51/51
• `uv run pytest tests/contract` — 670/670 (REST contract)
• `ARCHASTRO_RUN_CHANNEL_CONTRACT_TESTS=1 uv run pytest tests/contract/channels` — 51/51
• `uv run ruff check && uv run ruff format --check` — clean
• `uv build` → working `archastro_sdk-0.1.0-py3-none-any.whl`
• Total: 772/772 passing

Quantified improvements

Surface	Before	After
Resource methods using `**params`	30	0
Resource methods returning `dict[str, object]` (inline schema)	31	0
`datetime` fields typed as `str`	dozens	0
Nested inline objects collapsed to `dict[str, object]`	dozens	0 (only true freeform metadata bags)

Blocked on

• archastro-openapi#14 merges
• `Release` workflow dispatched for sdk-generator → 0.1.6 publishes to npm

Once those land, I'll regen from clean and mark this PR ready for review.

🤖 Generated with Claude Code

[archastro]

Reviewed 445cda5. No findings.