verbose live UI + tool-level SSE events + Groq default + regression tests

api/runtime/context.py

@@ -0,0 +1,12 @@
+"""Per-run context — exposes the active run_id to code deep in the call stack
+without threading it through every signature.
+
+Set by the runtime at run entry; read by Analyses and helper functions so they
+can publish trace events without needing the run_id passed in explicitly.
+"""
+
+from __future__ import annotations
+
+from contextvars import ContextVar
+
+current_run_id: ContextVar[str | None] = ContextVar("nvi.current_run_id", default=None)