fix(ci): repair red main — align QA evidence timeout guard, drop stale code-mode symbols

The qa-profile-evidence timeout was deliberately raised to 90m (28e09a04d3)
without its workflow guard; code-mode-repair.ts grew a local copy of
CodeModeFailurePhase stranding the runtime re-export, and the matrix test
kept an unused validateQaEvidenceSummaryJson import.

src/agents/code-mode-runtime.ts

@@ -51,7 +51,6 @@ export type CodeModeConfig = {
 };
 
 export type {
-  CodeModeFailurePhase,
   CodeModeSettlementMode,
   PendingBridgeRequest,
   SettledBridgeRequest,