feat(confidence-engine): preserve initial reconstruction relationships

lib/reconstruction/schema.js

@@ -126,6 +126,24 @@ const evidenceRecordSchema = z.object({
   importance: importanceEnum,
 });
 
+const reconstructionRelationshipSchema = z.object({
+  id: z.string().min(1),
+  fromId: z.string().min(1),
+  toId: z.string().min(1),
+  relationship: z.enum([
+    "supports",
+    "weakens",
+    "contradicts",
+    "depends_on",
+    "causes",
+    "may_cause",
+    "compares_with",
+    "other",
+  ]),
+  description: z.string().min(1),
+  confidence: confidenceEnum,
+});
+
 const reconstructionSchemaV2 = z.object({
   summary: z.string().min(1),
   actors: z.array(itemSchemaV1),
@@ -159,6 +177,7 @@ const reconstructionSchemaV2 = z.object({
       confidence: confidenceEnum,
     }),
   ),
+  relationships: z.array(reconstructionRelationshipSchema).optional().default([]),
 });
 
 const inputClassificationSchema = z.object({