Struct ResolveDependencyKeys 

pub struct ResolveDependencyKeys<'a> {
    pub ctx: &'a ExecKeyContext,
    pub idx: &'a IndexKeys,
    pub lane_id: &'a LaneId,
    pub upstream_ctx: &'a ExecKeyContext,
}

Extended key context for ff_resolve_dependency, which needs access to the upstream execution’s result key for server-side data_passing_ref resolution (Batch C item 3). Separate from DepOpKeys so the other dependency wrappers — ff_apply_dependency_to_child, ff_evaluate_flow_eligibility, ff_promote_blocked_to_eligible, ff_replay_execution — don’t have to carry an upstream context they never use.

Upstream and downstream are co-located on the same {fp:N} slot via flow membership (RFC-011 §7.3), so upstream_ctx builds the upstream key on the child’s partition.

Fields

ctx: &'a ExecKeyContext

idx: &'a IndexKeys

lane_id: &'a LaneId

upstream_ctx: &'a ExecKeyContext