test(instrument): tier-2 test port for embedding (port-as-is)

[mmercuri]

Summary

Port-as-is of the deeper unittest suite for the embedding adapter from ateam into stratix-python.

• Source: ateam/tests/adapters/test_embedding_adapter.py (183 LOC)
• Target: tests/instrument/adapters/frameworks/test_embedding_adapter.py (mirrors flat layout used by agno / bedrock_agents / llama_index ports)
• Base branch: feat/instrument-frameworks-agents (PR instrument: agent framework adapters (M1.C part 2) #97) — owns embedding/ adapter sources

Adjustments (only what the shim demanded)

• Imports rewritten:
  • stratix.sdk.python.adapters.base → layerlens.instrument.adapters._base.adapter (for AdapterStatus)
  • stratix.sdk.python.adapters.embedding.embedding_adapter → layerlens.instrument.adapters.frameworks.embedding.embedding_adapter
  • stratix.sdk.python.adapters.embedding.vector_store_adapter → layerlens.instrument.adapters.frameworks.embedding.vector_store_adapter
• No MockStratix in source — adapters are constructed bare (EmbeddingAdapter() / VectorStoreAdapter()) so transitional org_id pattern is not exercised here.
• All assertions, fixtures, and behaviors otherwise unchanged.

Test count

• 14 tests total: 9 TestEmbeddingAdapter + 5 TestVectorStoreAdapter
• Coverage: lifecycle (connect/disconnect/health), get_adapter_info, serialize_for_replay, OpenAI/Cohere/SentenceTransformer wrap-and-emit, Pinecone/Chroma/Weaviate wrap-and-emit

Result

14 passed in 2.30s

No tests skipped, no @Skip applied, no rewrites.

Test plan

• uv run --with pytest python -m pytest tests/instrument/adapters/frameworks/test_embedding_adapter.py -x — 14/14 pass