feat: bubble out appid into metadata

[CasperGN]

Description

The PR introduces automatically registering the agents appid into the metadata for simpler distinguishing multi-agent registrations to their respective appid's.

Issue reference

We strive to have all PR being opened based on an issue, where the problem or feature have been discussed prior to implementation.

Please reference the issue this PR closes: N/A

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Created/updated tests
• Tested this change against all the quickstarts
• Extended the documentation
  • Created the dapr/docs PR: N/A

Note: We expect contributors to open a corresponding documentation PR in the dapr/docs repository. As the implementer, you are the best person to document your work! Implementation PRs will not be merged until the documentation PR is opened and ready for review.

[sicoyle]

LGTM, glad this was an seamless add in 🎉

[sicoyle]

anyway you can fix this warning by chance?

50 [    INFO] dapr_agents.memory.daprstatestore: ConversationDaprStateMemory initialized with session ID: TestDurableAgent-session
2025-12-18 14:58:50 [    INFO] dapr_agents.tool.executor: Tool Executor initialized with 0 tool(s).
2025-12-18 14:58:50 [ WARNING] dapr_agents.agents.components: Conflict during registry mutation (attempt 1/10) for 'agents:default': Object of type MagicMock is not JSON serializable
2025-12-18 14:58:50 [    INFO] dapr_agents.agents.components: {'TestDurableAgent': {'name': 'TestDurableAgent', 'orchestrator': False, 'role': 'Test Durable Assistant', 'goal': 'Help with testing', 'instructions': ['Be helpful'], 'pubsub': {'agent_name': 'TestDurableAgent', 'name': 'testpubsub', 'agent_topic': 'TestDurableAgent'}, 'memory': {'type': 'ConversationDaprStateMemory', 'statestore': 'teststatestore', 'session_id': 'TestDurableAgent-session'}, 'llm': {'client': 'Mock', 'provider': 'MockOpenAIProvider', 'api': 'MockOpenAIAPI', 'model': 'gpt-4o-mock', 'prompt_template': 'ChatPromptTemplate'}, 'max_iterations': 10, 'agent': {'type': 'DurableAgent', 'appid': <MagicMock name='mock.application_id' id='140213714977936'>, 'statestore': 'teststatestore'}, 'registered_at': '2025-12-18T14:58:50.192375+00:00', 'registry': {'statestore': 'testregistry'}}}
2025-12-18 14:58:51 [ WARNING] dapr_agents.agents.components: Conflict during registry mutation (attempt 2/10) for 'agents:default': Object of type MagicMock is not JSON serializable

[CasperGN]

50 [ INFO] dapr_agents.memory.daprstatestore: ConversationDaprStateMemory initialized with session ID: TestDurableAgent-session
2025-12-18 14:58:50 [ INFO] dapr_agents.tool.executor: Tool Executor initialized with 0 tool(s).
2025-12-18 14:58:50 [ WARNING] dapr_agents.agents.components: Conflict during registry mutation (attempt 1/10) for 'agents:default': Object of type MagicMock is not JSON serializable
2025-12-18 14:58:50 [ INFO] dapr_agents.agents.components: {'TestDurableAgent': {'name': 'TestDurableAgent', 'orchestrator': False, 'role': 'Test Durable Assistant', 'goal': 'Help with testing', 'instructions': ['Be helpful'], 'pubsub': {'agent_name': 'TestDurableAgent', 'name': 'testpubsub', 'agent_topic': 'TestDurableAgent'}, 'memory': {'type': 'ConversationDaprStateMemory', 'statestore': 'teststatestore', 'session_id': 'TestDurableAgent-session'}, 'llm': {'client': 'Mock', 'provider': 'MockOpenAIProvider', 'api': 'MockOpenAIAPI', 'model': 'gpt-4o-mock', 'prompt_template': 'ChatPromptTemplate'}, 'max_iterations': 10, 'agent': {'type': 'DurableAgent', 'appid': , 'statestore': 'teststatestore'}, 'registered_at': '2025-12-18T14:58:50.192375+00:00', 'registry': {'statestore': 'testregistry'}}}
2025-12-18 14:58:51 [ WARNING] dapr_agents.agents.components: Conflict during registry mutation (attempt 2/10) for 'agents:default': Object of type MagicMock is not JSON serializable

@sicoyle I found it. Added return of .application_id from the MockDaprClient's .get_metadata().