fix(adk): make aclose calls type-safe on AsyncIterator (AGX1-391)

The resume backstop and its tests called .aclose() directly on streams typed AsyncIterator (only AsyncGenerator exposes aclose), failing the pyright lint. Guard via getattr like the existing source-stream close, keeping runtime behavior identical.

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

Author: declan-scale

src/agentex/lib/adk/_modules/_claude_code_sync.py

@@ -91,7 +91,9 @@ async def convert_claude_code_to_agentex_events(
         async for event in inner:
             yield event
     finally:
-        await inner.aclose()
+        inner_aclose = getattr(inner, "aclose", None)
+        if inner_aclose is not None:
+            await inner_aclose()
         aclose = getattr(lines, "aclose", None)
         if aclose is not None:
             await aclose()

src/agentex/lib/adk/_modules/_codex_sync.py

@@ -543,7 +543,9 @@ async def convert_codex_to_agentex_events(
         async for event in inner:
             yield event
     finally:
-        await inner.aclose()
+        inner_aclose = getattr(inner, "aclose", None)
+        if inner_aclose is not None:
+            await inner_aclose()
         aclose = getattr(events, "aclose", None)
         if aclose is not None:
             await aclose()

tests/lib/adk/test_claude_code_turn.py

@@ -345,5 +345,7 @@ async def _lines():
         # Consume only the first event, then close the stream early.
         async for _ in events:
             break
-        await events.aclose()
+        events_aclose = getattr(events, "aclose", None)
+        assert events_aclose is not None
+        await events_aclose()
         assert closed["value"] is True

tests/lib/adk/test_codex_turn.py

@@ -335,5 +335,7 @@ async def _events():
         gen = turn.events
         async for _ in gen:
             break
-        await gen.aclose()
+        gen_aclose = getattr(gen, "aclose", None)
+        assert gen_aclose is not None
+        await gen_aclose()
         assert closed["value"] is True