Add changelog for February 2, 2025 (#180)

Author: quantstruct-bot

fern/changelog/2025-02-01.mdx

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+# API Request Node, Improved Retries, and Enhanced Message Controls
+
+1. **HttpRequest Node Renamed to ApiRequest**: The `HttpRequest` workflow node has been renamed to [`ApiRequest`](https://api.vapi.ai/api#:~:text=ApiRequest), and can be accessed through `Assistant.model.workflow.nodes[type="api-request"]`. Key changes:
+   - New support for POST requests with customizable headers and body
+   - New async request support with `isAsync` flag
+   - Task status messages for waiting, starting, failure and success states
+<Warning>The `HttpRequest` node is now deprecated and will be removed in a future release. Please migrate to the new `ApiRequest` node.</Warning>
+
+2. **New Backoff and Retry Controls**: You can now configure [`Assistant.model.tools[type=dtmf].server.backoffPlan`](https://api.vapi.ai/api#:~:text=BackoffPlan) to handle failed requests with customizable retry strategies and delays.
+   - Supports fixed or exponential backoff strategies
+   - Configure `maxRetries` (up to 10) and `baseDelaySeconds` (up to 10 seconds)
+   - Available in server configurations via `backoffPlan` property
+
+3. **Enhanced Gather Node**: The [`Assistant.model.workflow.nodes[type=gather]`](https://api.vapi.ai/api#:~:text=Gather) node has been improved with the following changes:
+   - Added `maxRetries` property to control retry attempts
+   - Now accepts a single JsonSchema instead of an array
+   - Removed default value for `confirmContent` property
+
+4. **Improved Message Controls**: [`Assistant.messagePlan`](https://api.vapi.ai/api#:~:text=MessagePlan) has been improved with the following changes:
+   - Increased `idleTimeoutSeconds` maximum from 30 to 60 seconds
+   - Added `silenceTimeoutMessage` to customize call ending due to silence
+
+5. **New Distilled Deepseek Model with Groq**: You can now select `deepseek-r1-distill-llama-70b` when using [Groq](https://api.vapi.ai/api#:~:text=Groq) as the provider in [`Assistant.model[provider='groq']`](https://api.vapi.ai/api#:~:text=UpdateCallDTO-,Assistant,-UpdateAssistantDTO)
+
+6. **Edge Condition Updates**: Edge conditions now require explicit matching criteria to improve workflow control and readability. Semantic edges must specify a `matches` property while programmatic edges require a `booleanExpression` property to define transition logic.