fix(tests): use relative imports for the shared harness fakes (pyright)

Pyright can't statically resolve the absolute `tests.lib.core.harness._fakes` import
(it only works at pytest runtime via the rootdir on sys.path), failing ./scripts/lint.
Switch every consumer to a relative import (matching the conformance package's
convention) and re-sort the affected import blocks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: declan-scale

tests/lib/adk/test_pydantic_ai_sync.py

@@ -34,7 +34,6 @@
 )
 
 from agentex.lib.core.harness import UnifiedEmitter
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.types.reasoning_content import ReasoningContent
 from agentex.types.task_message_delta import TextDelta
 from agentex.types.tool_request_delta import ToolRequestDelta
@@ -54,6 +53,8 @@
 )
 from agentex.lib.adk._modules._pydantic_ai_turn import PydanticAITurn
 
+from ..core.harness._fakes import FakeTracing
+
 
 async def _aiter(events: list[Any]) -> AsyncIterator[Any]:
     for e in events:

tests/lib/core/harness/conformance/runner.py

@@ -66,7 +66,6 @@
 
 from agentex.types.text_delta import TextDelta
 from agentex.types.task_message import TaskMessage
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.types import SpanSignal, StreamTaskMessage
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.types.task_message_update import (
@@ -78,6 +77,8 @@
 from agentex.types.reasoning_content_delta import ReasoningContentDelta
 from agentex.lib.core.harness.span_derivation import SpanDeriver
 
+from .._fakes import FakeTracing
+
 
 @dataclass
 class Fixture:

tests/lib/core/harness/test_auto_send.py

@@ -15,7 +15,6 @@
 
 from agentex.types.task_message import TaskMessage
 from agentex.types.text_content import TextContent
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.types.task_message_delta import TextDelta
 from agentex.types.tool_request_delta import ToolRequestDelta
@@ -29,6 +28,8 @@
 from agentex.types.tool_request_content import ToolRequestContent
 from agentex.types.tool_response_content import ToolResponseContent
 
+from ._fakes import FakeTracing
+
 
 class _FakeCtx:
     """Mirrors StreamingTaskMessageContext: __aenter__ opens (returns self with task_message set),

tests/lib/core/harness/test_emitter.py

@@ -2,7 +2,6 @@
 
 from agentex.types.task_message import TaskMessage
 from agentex.types.text_content import TextContent
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.types import TurnUsage
 from agentex.lib.core.harness.emitter import UnifiedEmitter
 from agentex.types.task_message_delta import TextDelta
@@ -12,6 +11,8 @@
     StreamTaskMessageStart,
 )
 
+from ._fakes import FakeTracing
+
 
 class _FakeCtx:
     """Minimal StreamingTaskMessageContext fake (see test_auto_send.py)."""

tests/lib/core/harness/test_harness_claude_code_async.py

@@ -35,14 +35,15 @@
 import pytest
 
 from agentex.types.task_message import TaskMessage
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.types import TurnResult
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.lib.core.harness.emitter import UnifiedEmitter
 from agentex.types.tool_request_content import ToolRequestContent
 from agentex.types.tool_response_content import ToolResponseContent
 from agentex.lib.adk._modules._claude_code_turn import ClaudeCodeTurn
 
+from ._fakes import FakeTracing
+
 # ---------------------------------------------------------------------------
 # Native claude-code envelope fixtures
 # ---------------------------------------------------------------------------

tests/lib/core/harness/test_harness_claude_code_sync.py

@@ -39,7 +39,6 @@
 
 from typing import Any, AsyncIterator, override
 
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.types import OpenSpan, CloseSpan
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.lib.core.harness.emitter import UnifiedEmitter
@@ -52,6 +51,8 @@
 from agentex.types.tool_response_content import ToolResponseContent
 from agentex.lib.adk._modules._claude_code_turn import ClaudeCodeTurn
 
+from ._fakes import FakeTracing
+
 # ---------------------------------------------------------------------------
 # Native claude-code envelope fixtures (copied from the turn + conformance tests)
 # ---------------------------------------------------------------------------

tests/lib/core/harness/test_harness_codex_async.py

@@ -32,14 +32,15 @@
 from typing import Any, AsyncIterator
 
 from agentex.types.task_message import TaskMessage
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.types import TurnResult
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.lib.core.harness.emitter import UnifiedEmitter
 from agentex.types.tool_request_content import ToolRequestContent
 from agentex.types.tool_response_content import ToolResponseContent
 from agentex.lib.adk._modules._codex_turn import CodexTurn
 
+from ._fakes import FakeTracing
+
 # ---------------------------------------------------------------------------
 # Native codex event fixtures
 # ---------------------------------------------------------------------------

tests/lib/core/harness/test_harness_codex_sync.py

@@ -46,7 +46,6 @@
 
 from typing import Any, AsyncIterator, override
 
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.types import OpenSpan, CloseSpan
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.lib.core.harness.emitter import UnifiedEmitter
@@ -58,6 +57,8 @@
 from agentex.types.tool_response_content import ToolResponseContent
 from agentex.lib.adk._modules._codex_turn import CodexTurn
 
+from ._fakes import FakeTracing
+
 # ---------------------------------------------------------------------------
 # Native codex event fixtures (copied from the turn + conformance tests)
 # ---------------------------------------------------------------------------

tests/lib/core/harness/test_harness_langgraph_async.py

@@ -39,14 +39,15 @@
 
 from agentex.types.task_message import TaskMessage
 from agentex.types.text_content import TextContent
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.types import TurnResult
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.lib.core.harness.emitter import UnifiedEmitter
 from agentex.types.tool_request_content import ToolRequestContent
 from agentex.types.tool_response_content import ToolResponseContent
 from agentex.lib.adk._modules._langgraph_turn import LangGraphTurn
 
+from ._fakes import FakeTracing
+
 # ---------------------------------------------------------------------------
 # Remove conftest stubs so real langchain_core types are used
 # ---------------------------------------------------------------------------

tests/lib/core/harness/test_harness_langgraph_sync.py

@@ -36,7 +36,6 @@
 
 import pytest
 
-from tests.lib.core.harness._fakes import FakeTracing
 from agentex.lib.core.harness.tracer import SpanTracer
 from agentex.lib.core.harness.emitter import UnifiedEmitter
 from agentex.types.task_message_update import (
@@ -47,6 +46,8 @@
 from agentex.types.tool_response_content import ToolResponseContent
 from agentex.lib.adk._modules._langgraph_turn import LangGraphTurn
 
+from ._fakes import FakeTracing
+
 # ---------------------------------------------------------------------------
 # Remove conftest stubs so real langchain_core types are used
 # ---------------------------------------------------------------------------