Track adaptive writer and lifecycle reconciliation gaps from PR #10

[areshand]

PR #10 is being closed during the main-only branch cleanup, but several ideas should remain explicit rather than disappearing with the branch.

Already incorporated or superseded

• Its first six commits were incorporated through PR Simplify and harden the Rust control plane #11 (d34fbe2).
• Task-adaptive routing and deterministic iteration execution were superseded by the current sealed iteration architecture (AD-014), including PR Add deterministic iteration runtime executor #63 (c81351b).

Remaining gaps to evaluate against current architecture

• Enforce disjoint, path-scoped concurrent writer ownership at runtime rather than relying only on scheduling convention.
• Reconcile lifecycle state after out-of-band worker exits so terminal state cannot remain stale.
• Define bounded infrastructure retry and stale validation-lease reconciliation without weakening supervisor authority or deterministic iteration sealing.

Any implementation must preserve the current component boundaries: the orchestrator routes work, the supervisor owns lifecycle authority, and executable enforcement belongs in the runtime/control boundary rather than prompts alone.

Source history remains recoverable from the pre-cleanup complete Git bundle. Related historical PR: #10.