Moves the 11 private step/recovery helpers off the concrete orchestrator into
internal extension-fun files (Step: step, executeMove, enterStage,
decideGateExhaustion; Recovery: retry/route/ticket helpers). Class keeps the
override seams (run, cancel, submitApprovalDecision), the cross-module public API
(rehydrate, resume, submitClarification, submitSteering), enrich, and
validatedArtifactContent. File-private helpers the moved funs need are promoted
to internal. Pure relocation; clears TooManyFunctions on the class. kernel +
testing:kernel green; server/cli compile clean.
kami
1f794dad63