fix(build): register event_log in TOP_LEVEL_MODULES

The wheel-build drift gate caught it correctly: any new top-level
module under workspace/ must be listed in TOP_LEVEL_MODULES so its
`from event_log import …` statements get rewritten to
`from molecule_runtime.event_log import …` at package time.

Without this entry, the published wheel ships event_log.py un-rewritten
and crashes at runtime with ModuleNotFoundError on first heartbeat.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scripts/build_runtime_package.py

@@ -62,6 +62,7 @@ TOP_LEVEL_MODULES = {
     "configs_dir",
     "consolidation",
     "coordinator",
+    "event_log",
     "events",
     "executor_helpers",
     "heartbeat",