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,

test/scripts/ci-workflow-guards.test.ts

@@ -4852,7 +4852,7 @@ printf '%s\n' "\${CURL_SUCCESS_IP:-203.0.113.7}"
     expect(qaEvidenceWorkflow.on.workflow_dispatch.inputs.qa_profile).not.toHaveProperty("options");
     expect(qaEvidenceWorkflow.on.workflow_dispatch.inputs.qa_profile.default).toBe("all");
     expect(qaEvidenceWorkflow.on.workflow_call.inputs.qa_profile.type).toBe("string");
-    expect(qaRunJob["timeout-minutes"]).toBe(60);
+    expect(qaRunJob["timeout-minutes"]).toBe(90);
     const validateProfileStep = qaRunJob.steps.find(
       (step: WorkflowStep) => step.name === "Validate QA profile input",
     );

test/scripts/code-mode-model-matrix.test.ts

@@ -11,7 +11,6 @@ import {
   reserveCodeModeMatrixOutputDir,
   resolveCodeModeMatrixOutputDir,
   runCodeModeModelMatrix,
-  validateQaEvidenceSummaryJson,
   type CodeModeMatrixCellResult,
 } from "../../scripts/code-mode-model-matrix.ts";
 import type { AgentExecEnvelope } from "../../src/commands/agent-exec.ts";