Splits the 3.7k-line SessionOrchestrator into the state-owning abstract class
(fields + open/abstract seams: run, cancel, runInference, mapValidationOutcome,
estimateTokens) plus behavior-preserving internal extension-fun files grouped by
concern: Artifacts, ToolExec, Workspace, Context, RepoContext, Gates, Gates2,
Workflow, Approval, Preview. Two public members consumed cross-module
(liveClarificationRequestIds, requestPlanApproval) stay on the class. Each file
kept <=10 top-level funs; pure relocation, no logic changes.
Clears LargeClass; adds no new TooManyFunctions. kernel test + detekt green;
server/cli compile clean.
kami
670e0c4828