fix: coverage pragmas for platform-dependent async coverage gaps

- test_multi_tenancy_e2e.py: use `pragma: lax no cover` on
  `tg.cancel_scope.cancel()` lines — covered locally but missed on
  some CI matrix entries due to cancellation unwinding differences
- test_multi_tenancy_oauth_e2e.py: use `pragma: no branch` on nested
  `async with ClientSession` — coverage.py misreports the ->exit arc
  for nested async with on Python 3.11+

Author: andylim-duo

tests/server/mcpserver/test_multi_tenancy_e2e.py

@@ -102,7 +102,7 @@ async def run_server() -> None:
                 assert len(tools.tools) == 1
                 assert tools.tools[0].name == "compute"
 
-            tg.cancel_scope.cancel()
+            tg.cancel_scope.cancel()  # pragma: lax no cover
 
 
 async def test_tenant_b_sees_only_own_tools():
@@ -133,7 +133,7 @@ async def run_server() -> None:
                 assert len(tools.tools) == 1
                 assert tools.tools[0].name == "compute"
 
-            tg.cancel_scope.cancel()
+            tg.cancel_scope.cancel()  # pragma: lax no cover
 
 
 async def test_global_scope_sees_nothing_when_all_tenant_scoped():
@@ -164,7 +164,7 @@ async def test_global_scope_sees_nothing_when_all_tenant_scoped():
                 prompts = await session.list_prompts()
                 assert len(prompts.prompts) == 0
 
-            tg.cancel_scope.cancel()
+            tg.cancel_scope.cancel()  # pragma: lax no cover
 
 
 async def test_tenant_tool_returns_correct_result():
@@ -195,7 +195,7 @@ async def run_server() -> None:
                 texts = [c.text for c in result.content if isinstance(c, TextContent)]
                 assert any("tenant-a:42" in t for t in texts)
 
-            tg.cancel_scope.cancel()
+            tg.cancel_scope.cancel()  # pragma: lax no cover
 
 
 async def test_tenant_resource_isolation():
@@ -227,7 +227,7 @@ async def run_server(tid: str = tenant) -> None:
                     assert len(resources.resources) == 1
                     assert resources.resources[0].name == expected_name
 
-                tg.cancel_scope.cancel()
+                tg.cancel_scope.cancel()  # pragma: lax no cover
 
 
 async def test_tenant_prompt_isolation():
@@ -263,7 +263,7 @@ async def run_server(tid: str = tenant) -> None:
                     text = result.messages[0].content.text  # type: ignore[union-attr]
                     assert tenant in text
 
-                tg.cancel_scope.cancel()
+                tg.cancel_scope.cancel()  # pragma: lax no cover
 
 
 async def test_context_tenant_id_available_in_tool():
@@ -301,7 +301,7 @@ async def run_server() -> None:
                 await session.initialize()
                 await session.call_tool("check_tenant", {})
 
-            tg.cancel_scope.cancel()
+            tg.cancel_scope.cancel()  # pragma: lax no cover
 
     assert captured_tenant == ["my-tenant"]
 

tests/server/mcpserver/test_multi_tenancy_oauth_e2e.py

@@ -297,7 +297,7 @@ async def test_alpha_sees_only_own_tools(starlette_app: Starlette):
                 url="http://localhost/mcp",
                 http_client=http_client,
             ) as (read_stream, write_stream):
-                async with ClientSession(read_stream, write_stream) as session:
+                async with ClientSession(read_stream, write_stream) as session:  # pragma: no branch
                     await session.initialize()
                     # List tools — should only see alpha's tools
                     tools = await session.list_tools()
@@ -321,7 +321,7 @@ async def test_beta_sees_only_own_tools(starlette_app: Starlette):
                 url="http://localhost/mcp",
                 http_client=http_client,
             ) as (read_stream, write_stream):
-                async with ClientSession(read_stream, write_stream) as session:
+                async with ClientSession(read_stream, write_stream) as session:  # pragma: no branch
                     await session.initialize()
                     tools = await session.list_tools()
                     tool_names = sorted(t.name for t in tools.tools)
@@ -345,7 +345,7 @@ async def test_alpha_can_call_own_tool(starlette_app: Starlette):
                 url="http://localhost/mcp",
                 http_client=http_client,
             ) as (read_stream, write_stream):
-                async with ClientSession(read_stream, write_stream) as session:
+                async with ClientSession(read_stream, write_stream) as session:  # pragma: no branch
                     await session.initialize()
                     result = await session.call_tool("query", {"sql": "SELECT 1"})
                     texts = [c.text for c in result.content if isinstance(c, TextContent)]
@@ -375,7 +375,7 @@ async def test_whoami_returns_correct_tenant(starlette_app: Starlette):
                     url="http://localhost/mcp",
                     http_client=http_client,
                 ) as (read_stream, write_stream):
-                    async with ClientSession(read_stream, write_stream) as session:
+                    async with ClientSession(read_stream, write_stream) as session:  # pragma: no branch
                         await session.initialize()
                         result = await session.call_tool("whoami", {})
                         texts = [c.text for c in result.content if isinstance(c, TextContent)]