instrument: agent framework adapters (M1.C part 2)

[mmercuri]

Summary

Ports the twelve agent-tier framework adapters from the ateam
reference implementation onto the new layerlens.instrument base
layer:

Semantic Kernel, LlamaIndex, OpenAI Agents, Pydantic-AI, Agno,
Strands, SmolAgents, MS Agent Framework, Google ADK,
Bedrock Agents, Embedding (vector store hooks), Benchmark Import

Pairs with feat/instrument-frameworks-orchestration (M1.C part 1)
which lands LangChain, LangGraph, CrewAI, AutoGen, Langfuse, and
Agentforce. Together they complete M1.C.

Scope

• src/layerlens/instrument/adapters/frameworks/{semantic_kernel,llama_index,openai_agents,pydantic_ai,agno,strands,smolagents,ms_agent_framework,google_adk,bedrock_agents,embedding,benchmark_import}/
  — per-framework packages
• tests/instrument/adapters/frameworks/test_*_adapter.py + the
  test_bulk_ported_smoke.py harness (which exercises every ported
  adapter against canned trace fixtures so partial framework SDKs on
  a given runner don't drop coverage to zero)
• samples/instrument/<framework>/ — runnable per-framework samples
• docs/adapters/frameworks-<framework>.md — per-framework
  integration guide
• pyproject.toml — twelve new optional extras (semantic-kernel,
  llama-index, openai-agents, pydantic-ai, agno, strands,
  smolagents, ms-agent-framework, google-adk, bedrock-agents,
  embedding, benchmark-import) with python_version markers;
  pyright/ruff exclusions for the dynamic monkey-patching framework
  code

Blast radius

• Default pip install layerlens install set is unchanged. Each
  framework's heavy deps are gated behind their own extra.
• No changes to existing public API surface.
• Importing layerlens.instrument still does NOT pull in any
  framework module (lazy registry lookup).

Test plan

• uv run pytest tests/instrument/adapters/frameworks/ -x —
  184 passed, 1 skipped (test_bulk_ported_smoke.py covers all 12
  agent-tier adapters plus the orchestration-tier ones from part 1
  via the same harness)
• Reviewer (m-peko) verifies callback/lifecycle wiring

Stacks on

• feat/instrument-base-foundation (M1.A) — required for the
  BaseAdapter surface this PR consumes.

Sibling of

• feat/instrument-frameworks-orchestration (M1.C part 1) — both
  branches stack on the base foundation independently and don't
  conflict; they can land in either order.

Linear

LAY-3400 umbrella (M1.C part 2).

[mmercuri]

Linear: https://linear.app/layerlens/issue/LAY-3400 (Framework adapters part 2 — agent tier: Semantic Kernel, LlamaIndex, OpenAI Agents, Pydantic-AI, Agno, Strands, SmolAgents, MS Agent Framework, Google ADK, Bedrock Agents, Embedding, Benchmark Import). Stacked on PR #93. Under Apollo M1 epic LAY-3423.