build(fase1): add dev orchestration + solver + async deps, scaffold spikes

tests/spikes/__init__.py

@@ -0,0 +1,3 @@
+"""Throwaway Fase 1 de-risk spike tests — dev-only, never shipped in the wheel;
+safe to delete after findings are recorded.
+"""

tests/spikes/test_imports.py

@@ -0,0 +1,29 @@
+"""Step 1 import smoke: the throwaway spikes package resolves, and the dev-only
+orchestration + solver + async dependencies are importable.
+
+Pattern: tests/test_smoke.py (plain functions, no fixtures).
+"""
+
+
+def test_spikes_package_imports() -> None:
+    import spikes  # noqa: F401  (repo-root on pythonpath; no collision with installed dists)
+
+
+def test_orchestration_builders_import() -> None:
+    # The GA orchestration builders live in the separate `agent-framework-orchestrations`
+    # package (NOT top-level agent_framework, NOT core) — confirmed by introspection + PyPI.
+    from agent_framework.orchestrations import (  # noqa: F401
+        ConcurrentBuilder,
+        GroupChatBuilder,
+        MagenticBuilder,
+        StandardMagenticManager,
+        TerminationCondition,
+    )
+
+
+def test_solver_imports() -> None:
+    import pulp  # noqa: F401  (Spike C — bundles a CBC binary in its wheel)
+
+
+def test_async_runner_imports() -> None:
+    import pytest_asyncio  # noqa: F401  (MAF orchestrations are async)