Python: Add Python parity for HttpRequestAction in declarative workflow (#5599)

* Add Python parity for HttpRequestAction in declarative workflow

* Ran pyupgrade and pright to fix CI issues

* Fix conversation ID dot parsing for http executor

* Removed unnecessary export command

python/samples/03-workflows/declarative/invoke_http_request/main.py

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+# Copyright (c) Microsoft. All rights reserved.
+
+"""Invoke HTTP Request sample - demonstrates the HttpRequestAction declarative action.
+
+This sample shows how to:
+  1. Configure a ``WorkflowFactory`` with a ``HttpRequestHandler`` so the YAML
+     ``HttpRequestAction`` can dispatch real HTTP calls.
+  2. Fetch JSON from a public REST endpoint (the GitHub repository API) and
+     bind the parsed response to a workflow variable.
+  3. Mirror the response body into the conversation via ``conversationId`` so
+     a downstream Foundry agent can answer questions about it using only that
+     conversation context.
+
+Security note:
+    ``DefaultHttpRequestHandler`` issues HTTP calls to whatever URL the
+    workflow author specifies and performs **no** allowlisting or SSRF
+    guards. For production use, replace it with a custom handler that
+    enforces an allowlist or DNS-rebinding-resistant policy and adds any
+    required authentication headers per call.
+
+Run with:
+    python -m samples.03-workflows.declarative.invoke_http_request.main
+"""
+
+import asyncio
+import os
+from pathlib import Path
+
+from agent_framework import Agent
+from agent_framework.declarative import (
+    DefaultHttpRequestHandler,
+    WorkflowFactory,
+)
+from agent_framework.foundry import FoundryChatClient
+from azure.identity import AzureCliCredential
+
+GITHUB_REPO_INFO_AGENT_INSTRUCTIONS = """\
+You answer the user's question about a GitHub repository using ONLY the JSON
+data already present in the conversation history. If the answer is not
+contained in the conversation, say so plainly rather than guessing. Be concise
+and helpful.
+"""
+
+
+async def main() -> None:
+    """Run the invoke HTTP request workflow."""
+    chat_client = FoundryChatClient(
+        project_endpoint=os.environ["FOUNDRY_PROJECT_ENDPOINT"],
+        model=os.environ["FOUNDRY_MODEL"],
+        credential=AzureCliCredential(),
+    )
+
+    # The agent has no tools — it answers the question about the GitHub
+    # repository using only the JSON data that ``HttpRequestAction`` adds to
+    # the conversation.
+    github_repo_info_agent = Agent(
+        client=chat_client,
+        name="GitHubRepoInfoAgent",
+        instructions=GITHUB_REPO_INFO_AGENT_INSTRUCTIONS,
+    )
+
+    agents = {"GitHubRepoInfoAgent": github_repo_info_agent}
+
+    # The default HttpRequestHandler is sufficient for this sample because
+    # the GitHub REST endpoint used here does not require authentication.
+    # For authenticated endpoints, supply a custom client_provider callback
+    # to DefaultHttpRequestHandler so each request can be routed through a
+    # pre-configured httpx.AsyncClient with the appropriate credentials.
+    async with DefaultHttpRequestHandler() as http_handler:
+        factory = WorkflowFactory(
+            agents=agents,
+            http_request_handler=http_handler,
+        )
+
+        workflow_path = Path(__file__).parent / "workflow.yaml"
+        workflow = factory.create_workflow_from_yaml_path(workflow_path)
+
+        print("=" * 60)
+        print("Invoke HTTP Request Workflow Demo")
+        print("=" * 60)
+        print()
+        print("Ask one question about the microsoft/agent-framework repo.")
+        print()
+
+        user_input = input("You: ").strip()  # noqa: ASYNC250
+        if not user_input:
+            user_input = "Please summarize the repository."
+
+        print("\nAgent: ", end="", flush=True)
+        async for event in workflow.run(user_input, stream=True):
+            if event.type == "output" and isinstance(event.data, str):
+                print(event.data, end="", flush=True)
+        print()
+
+
+if __name__ == "__main__":
+    asyncio.run(main())

python/samples/03-workflows/declarative/invoke_http_request/workflow.yaml

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+#
+# This workflow demonstrates the HttpRequestAction declarative action.
+#
+# HttpRequestAction lets a workflow author issue an HTTP call directly from
+# YAML without writing any Python glue. It can:
+#
+#   - fetch data from external REST endpoints,
+#   - store the parsed response in a workflow variable, and
+#   - add the response body to the conversation so a downstream agent can
+#     answer questions based on it.
+#
+# This sample fetches public metadata for the microsoft/agent-framework
+# repository from the GitHub REST API (no authentication required) and uses
+# a Foundry agent to answer a single question about it.
+#
+# Example input:
+#   How many open issues does the repository have?
+#
+kind: Workflow
+trigger:
+
+  kind: OnConversationStart
+  id: workflow_invoke_http_request_demo
+  actions:
+
+    # Set the repository org/name used to form the request URL.
+    - kind: SetVariable
+      id: set_repo_name
+      variable: Local.RepoName
+      value: microsoft/agent-framework
+
+    # Invoke the GitHub repo API. The response body is parsed into
+    # Local.RepoInfo and also added to the conversation (via conversationId)
+    # so the agent below can answer questions based on it.
+    - kind: HttpRequestAction
+      id: fetch_repo_info
+      conversationId: =System.ConversationId
+      method: GET
+      url: =Concatenate("https://api.github.com/repos/", Local.RepoName)
+      headers:
+        Accept: application/vnd.github+json
+        User-Agent: agent-framework-sample
+      response: Local.RepoInfo
+
+    # Use the agent to answer the user's question using the conversation
+    # context (which now contains the GitHub JSON response). The user's
+    # original message is already in the conversation as System.LastMessage,
+    # and the executor's input fallback chain extracts its ``Text`` field
+    # automatically when ``input.messages`` is omitted.
+    - kind: InvokeAzureAgent
+      id: answer_question
+      conversationId: =System.ConversationId
+      agent:
+        name: GitHubRepoInfoAgent
+      output:
+        autoSend: true
+        messages: Local.AgentResponse