Fix snapshot tests for gen_ai.conversation.id attribute

Use IsStr() matcher for non-deterministic ULID-based conversation IDs
in span attribute snapshots.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: adriangb

tests/models/test_fallback.py

@@ -172,6 +172,8 @@ def test_first_failed_instrumented(capfire: CaptureLogfire) -> None:
                         'thinking': None,
                     },
                     'logfire.span_type': 'span',
+                    'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'gen_ai.provider.name': 'function',
                     'logfire.msg': 'chat fallback:function:failure_response:,function:success_response:',
                     'gen_ai.system': 'function',
@@ -203,6 +205,7 @@ def test_first_failed_instrumented(capfire: CaptureLogfire) -> None:
                     'model_name': 'fallback:function:failure_response:,function:success_response:',
                     'agent_name': 'agent',
                     'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'logfire.msg': 'agent run',
                     'logfire.span_type': 'span',
                     'gen_ai.usage.input_tokens': 51,
@@ -283,6 +286,8 @@ async def test_first_failed_instrumented_stream(capfire: CaptureLogfire) -> None
                         'thinking': None,
                     },
                     'logfire.span_type': 'span',
+                    'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'gen_ai.provider.name': 'function',
                     'logfire.msg': 'chat fallback:function::failure_response_stream,function::success_response_stream',
                     'gen_ai.system': 'function',
@@ -314,6 +319,7 @@ async def test_first_failed_instrumented_stream(capfire: CaptureLogfire) -> None
                     'model_name': 'fallback:function::failure_response_stream,function::success_response_stream',
                     'agent_name': 'agent',
                     'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'logfire.msg': 'agent run',
                     'logfire.span_type': 'span',
                     'final_result': 'hello world',
@@ -401,6 +407,8 @@ def test_all_failed_instrumented(capfire: CaptureLogfire) -> None:
                     },
                     'logfire.span_type': 'span',
                     'logfire.msg': 'chat fallback:function:failure_response:,function:failure_response:',
+                    'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'logfire.level_num': 17,
                     'gen_ai.response.model': 'fallback:function:failure_response:,function:failure_response:',
                 },
@@ -427,6 +435,7 @@ def test_all_failed_instrumented(capfire: CaptureLogfire) -> None:
                     'model_name': 'fallback:function:failure_response:,function:failure_response:',
                     'agent_name': 'agent',
                     'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'logfire.msg': 'agent run',
                     'logfire.span_type': 'span',
                     'logfire.exception.fingerprint': '0000000000000000000000000000000000000000000000000000000000000000',
@@ -894,6 +903,8 @@ def prompted_output_func(_: list[ModelMessage], info: AgentInfo) -> ModelRespons
                         'thinking': None,
                     },
                     'logfire.span_type': 'span',
+                    'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'gen_ai.provider.name': 'function',
                     'logfire.msg': 'chat fallback:function:tool_output_func:,function:prompted_output_func:',
                     'gen_ai.system': 'function',
@@ -927,6 +938,7 @@ def prompted_output_func(_: list[ModelMessage], info: AgentInfo) -> ModelRespons
                     'model_name': 'fallback:function:tool_output_func:,function:prompted_output_func:',
                     'agent_name': 'agent',
                     'gen_ai.agent.name': 'agent',
+                    'gen_ai.conversation.id': IsStr(),
                     'logfire.msg': 'agent run',
                     'logfire.span_type': 'span',
                     'gen_ai.usage.input_tokens': 51,