Update guidance for the cleaned public API

docs/roadmap/remediation.md

@@ -5,7 +5,8 @@ Algorithmic follow-up: `91769e9` (unchanged production code).
 Comparison baseline: `0dd16aa8a935645ae2847d32edd86461dc4618f0`
 (the planning commit, before the implementation sprint).
 
-Scope: the completed [implementation plan](implementation.md) and
+Scope: the completed implementation plan at
+`07e4ae5:docs/roadmap/implementation.md` and
 [interface remediation roadmap](interface-remediation.md). This report records
 remaining defects and newly introduced scalability problems; it does not change
 the selected architecture or public contracts. All eight findings are complete;