Track integration releases before langchain-tests tool-call streaming release

The `tool_call_streaming` standard-test change has landed, and the foundational releases are done/in progress: - `langchain-core==1.4.5` includes `ModelProfile.tool_call_streaming`. - `langchain-model-profiles==0.0.6` includes generator support for emitting `tool_call_streaming` profile data. We should hold integration package releases for now so they can be bundled with other integration changes, then release `langchain-tests` after those integration packages are available. Integration packages with generated profile data updates to include in future releases: - `langchain-openai` - `langchain-anthropic` - `langchain-fireworks` - `langchain-huggingface` - `langchain-openrouter` - `langchain-deepseek` - `langchain-xai` Suggested release order: 1. Release the integration packages above, bundled with any other pending integration changes. 2. Then release `langchain-tests` / standard-tests. Reason for ordering: the stricter standard test is profile-gated, but for the opted-in providers it depends on the partner packages shipping refreshed runtime profile data first. Releasing `langchain-tests` after the partner packages avoids users picking up stricter standard tests before those provider profiles include the new `tool_call_streaming` flag. Notes: - Perplexity Responses passed smoke testing, but its profile strategy needs follow-up because current generated Perplexity profiles cover the `sonar` family while the smoke path used a routed Responses model string. - MistralAI is intentionally excluded for now: it streams `.tool_call_chunks`, but its content-block translator currently exposes a complete `tool_call` block instead of `tool_call_chunk`.