Use the shared binding-at-read owner instead of grouping schedules across the
whole binding lifetime. Match selected initializer nodes, retain uncertain
origins as candidate links, and preserve immutable closure captures.
Adapt the diagnosis in PR #3794 by @Xinglan233, whose source commit was authored
by Codex. Verify stale writes, later schedules, replacements and CLI graph links.
Refs #3358, #3794
Co-authored-by: Codex <codex@openai.com>
