Feat/cleanup python sdk

[RahmeKarim]

Note

High Risk
Breaking removals and default dependency changes will break imports and fresh installs; the large regenerated API surface also increases the chance of subtle client regressions despite unchanged runtime behavior claims.

Overview
2.4.0 is a breaking release that aligns the Python SDK with the Node client and trims legacy surface area.

Packaging: Provider SDKs (openai, anthropic, google-genai, mistralai) are no longer default dependencies; install via extras such as metorial[openai] or metorial[all]. README documents the install matrix.

Client API: The Magnetar client is regenerated and wired through subclass-based endpoint groups (no dynamic Any delegation), with new top-level groups on Metorial—integrations, documents, stores, files, skills, callbacks, magic_mcp, portals, plus providers.triggers. Several non-public endpoints (provider_categories, sessions.events, etc.) are dropped from the public client.

Removals: The adapters package, Pulsar generated code, ClientCoreMixin, _config / MetorialConfig, RawResponse, streaming helpers, provider chat_completions exports, and assorted unused internals are deleted; metorial.providers and connect() remain the supported paths.

Fixes: Anthropic tool args use json.loads instead of eval. OpenAI Agents and Haystack invoke tools with the original MCP name, not the sanitized display name.

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