fix(evidence): retain completed observations on late cancellation

Validate completed reports before cancellation projection, retain valid
Evidence and captured command diagnostics, and convert raw cleanup partials
at their application owner. Record partial Evidence consistently across MCP
handlers. Keep page inspection separate from unfinished bundle analysis.

Refs #4261

src/application/javascript/JavaScriptRuntimeObservationEvidence.ts

@@ -4,7 +4,6 @@ import {
   type Evidence,
   type EvidenceObservation,
 } from "../../domain/evidence.js";
-import { jsonValueSchema } from "../../domain/jsonValue.js";
 import type {
   JavaScriptRuntimeObservation,
   JavaScriptRuntimeTargetList,
@@ -30,7 +29,7 @@ export const createJavaScriptRuntimeObservationEvidence = (
         : "rea.javascript-runtime-observation",
     operation,
     parameters: parameters(input),
-    result: jsonValueSchema.parse(result),
+    result,
     rawResult: null,
     confidence: "observed",
     authority: "external-service",