refactor(live): generalize AudioCacheManager into CacheManager and wire live flow - #7348
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…re live flow - Introduce `CacheManager`, `CacheConfig`, and `RealtimeCacheEntry` in `google.adk.live._cache_manager` with `cache_blob()` MIME routing, shared `_save_artifact_and_build_event()`, and concurrent fault-isolated cache flushing (`asyncio.gather(..., return_exceptions=True)`). - Keep `google.adk.live._audio_cache_manager` and `google.adk.flows.llm_flows.audio_cache_manager` as backward-compatible re-export shims (`AudioCacheManager = CacheManager`, `AudioCacheConfig = CacheConfig`). - Add `input_media_realtime_cache` and `output_media_realtime_cache` fields to `InvocationContext`. - Add `self.cache_manager = CacheManager()` to `BaseLlmFlow` with deprecated `__getattribute__`/`__setattr__` forwarding for `self.audio_cache_manager`. - Update `_live_llm_flow.py` and `_flow_utils.py` to use `flow.cache_manager` and `cache_manager.cache_blob()`. Testing Plan: - Added unit tests in `tests/unittests/live/test_cache_manager.py` covering `CacheManager`, `CacheConfig`, `cache_blob()` routing, MIME parameter normalization, and concurrent fault-isolated flushing. - Updated `tests/unittests/live/test_audio_cache_manager.py`, `tests/unittests/live/test_flow_utils.py`, `tests/unittests/live/test_live_llm_flow.py`, and `tests/unittests/flows/llm_flows/test_audio_cache_manager.py`. PiperOrigin-RevId: 990565785
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refactor(live): generalize AudioCacheManager into CacheManager and wire live flow
CacheManager,CacheConfig, andRealtimeCacheEntryingoogle.adk.live._cache_managerwithcache_blob()MIME routing, shared_save_artifact_and_build_event(), and concurrent fault-isolated cache flushing (asyncio.gather(..., return_exceptions=True)).google.adk.live._audio_cache_managerandgoogle.adk.flows.llm_flows.audio_cache_manageras backward-compatible re-export shims (AudioCacheManager = CacheManager,AudioCacheConfig = CacheConfig).input_media_realtime_cacheandoutput_media_realtime_cachefields toInvocationContext.self.cache_manager = CacheManager()toBaseLlmFlowwith deprecated__getattribute__/__setattr__forwarding forself.audio_cache_manager._live_llm_flow.pyand_flow_utils.pyto useflow.cache_managerandcache_manager.cache_blob().Testing Plan:
tests/unittests/live/test_cache_manager.pycoveringCacheManager,CacheConfig,cache_blob()routing, MIME parameter normalization, and concurrent fault-isolated flushing.tests/unittests/live/test_audio_cache_manager.py,tests/unittests/live/test_flow_utils.py,tests/unittests/live/test_live_llm_flow.py, andtests/unittests/flows/llm_flows/test_audio_cache_manager.py.