chore: regen API types + 5 DevEx round-3 SDK fixes

[github-actions]

Builds on the auto-regenerated Pydantic types (which pick up the new MCP and API values on MonitorManagedBy) with five DevEx round-3 ergonomics fixes that surfaced while exercising the SDK from a fresh laptop.

Summary

#	Round-3 ID	Fix	Commit
1	(auto-regen)	Pick up MCP / API on MonitorManagedBy	f8eb9eb
2	P1.Bug5	Allow snake_case kwargs via populate_by_name=True	97cbc9f
3	P0.Bug4	Pydantic Field(discriminator=…) on tagged unions — 161 errors → 1	19b182f
4	P1.Bug14	Expose devhelm.__version__	3bcc9f6
5	P1.Bug7	client.monitors.list(enabled=…, type=…, …) filter kwargs	66bec7b
6	P1.Bug9	Banner on MonitorDto noting currentStatus removal (in-scope half)	cc358fa

Detail

#2 — populate_by_name=True

extra='forbid' plus validation_alias=camelCase rejected snake_case kwargs, so CreateMonitorRequest(frequency_seconds=60, managed_by='API') raised ValidationError. Patched the inject_strict_config.py template + every generated model_config block so models accept both spellings now.

#3 — Discriminator on tagged unions

A typo on operator='eq' (should be 'equals') inside a status_code assertion previously emitted 161 validation errors because Pydantic walked every arm of the 41-member assertion union. Extended inject_strict_config.py with a post-pass that detects classes whose first payload field is a single-member Literal[…] and wraps qualifying parenthesized unions in Annotated[Union[…], Field(discriminator=…)]. Applies to CreateAssertionRequest.config, UpdateAssertionRequest.config, alert-channel configs in Create/Test/UpdateAlertChannelRequest, and MonitorTestRequest.config. Same input now emits 1 error.

#4 — devhelm.__version__

python -c "import devhelm; print(devhelm.__version__)" raised AttributeError. Resolves it from importlib.metadata.version("devhelm") at import time (with "unknown" fallback for editable installs) and lists it in __all__. Backed by TestSdkVersionExposed in tests/test_client.py.

#5 — client.monitors.list(...) filters

Surfaces every documented GET /api/v1/monitors query param (enabled, type, managed_by, tags, search, environment_id) as keyword-only arguments on Monitors.list() and Monitors.list_page(). Threaded through _pagination.fetch_all_pages / fetch_page via a new extra_params keyword so future filter additions land in one place. Pagination keys still win in the merge so the iterator's invariants stay intact. Backed by TestMonitorsListFilters in tests/test_client.py.

#6 — currentStatus deprecation banner

The docs-quickstart shows monitor.currentStatus, but that field was removed from the DTO and never came back. Added a class-level docstring banner via inject_strict_config.py (keyed by class name in a CLASS_BANNERS table) so the note shows in IDE hovers and survives regen. Restoring current_status in the spec is upstream mono work, tracked separately.

Verification

uv run pytest -q              # 723 passed
uv run mypy src/              # Success: no issues found in 24 source files
uv run ruff check src/ tests/ # All checks passed!
uv run ruff format --check    # 34 files already formatted

$ grep -A 6 'class ManagedBy' src/devhelm/_generated.py
class ManagedBy(StrEnum):
    dashboard = "DASHBOARD"
    cli = "CLI"
    terraform = "TERRAFORM"
    mcp = "MCP"
    api = "API"

$ uv run python -c "
from devhelm._generated import CreateAssertionRequest
try:
    CreateAssertionRequest.model_validate({'config': {'type': 'status_code', 'expected': '200', 'operator': 'eq'}})
except Exception as e:
    print(f'errors: {e.error_count()}')
"
errors: 1

Out of scope

• No pyproject.toml version bump — that ships with the next release.
• Restoring current_status to MonitorDto requires editing mono; tracked as upstream follow-up.