feat: add rag evidence postprocess blocks

src/test/java/com/superbiz/agent/service/ToolInvocationRecorderTest.java

@@ -2,6 +2,7 @@ package com.superbiz.agent.service;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.superbiz.agent.domain.entity.ToolInvocation;
+import com.superbiz.agent.dto.EvidenceBlock;
 import com.superbiz.agent.repository.ToolInvocationRepository;
 import com.superbiz.agent.util.SessionContextHolder;
 import org.junit.jupiter.api.Test;
@@ -78,6 +79,14 @@ class ToolInvocationRecorderTest {
                 .l0MatchedKeywords(List.of("ERR_TIMEOUT"))
                 .l0Domains(List.of("payment"))
                 .l0Entities(List.of("ERR_TIMEOUT"))
+                .evidenceCandidateCount(2)
+                .evidenceBlockCount(1)
+                .evidenceBlocks(List.of(Map.of(
+                        "source", "payment/errors.md",
+                        "title", "payment/errors.md",
+                        "retrieval_layer", "L0+L1",
+                        "hit_reasons", List.of("l0_keywords:ERR_TIMEOUT", "semantic_rank:1")
+                )))
                 .build();
 
         try {
@@ -98,5 +107,45 @@ class ToolInvocationRecorderTest {
         assertTrue(saved.getRetrievalDetails().contains("\"l0_matched_keywords\":[\"ERR_TIMEOUT\"]"));
         assertTrue(saved.getRetrievalDetails().contains("\"l0_domains\":[\"payment\"]"));
         assertTrue(saved.getRetrievalDetails().contains("\"l0_entities\":[\"ERR_TIMEOUT\"]"));
+        assertTrue(saved.getRetrievalDetails().contains("\"evidence_candidate_count\":2"));
+        assertTrue(saved.getRetrievalDetails().contains("\"evidence_block_count\":1"));
+        assertTrue(saved.getRetrievalDetails().contains("\"evidence_blocks\""));
+    }
+
+    @Test
+    void lookupKnowledgeRecordFromSummarizesEvidenceBlocks() {
+        EvidenceBlock block = EvidenceBlock.builder()
+                .source("doc.md")
+                .title("Doc")
+                .breadcrumb("A > B")
+                .retrievalLayer("L1")
+                .score(0.42)
+                .hitReasons(List.of("semantic_rank:1"))
+                .content("x".repeat(220))
+                .build();
+
+        com.superbiz.agent.dto.LookupResult result = com.superbiz.agent.dto.LookupResult.builder()
+                .found(true)
+                .evidenceCandidateCount(3)
+                .evidenceBlockCount(1)
+                .evidenceBlocks(List.of(block))
+                .build();
+
+        ToolInvocationRecorder.LookupKnowledgeRecord record = ToolInvocationRecorder.LookupKnowledgeRecord.from(
+                "query",
+                KnowledgeIndexService.L0Hint.empty(),
+                List.of(),
+                false,
+                result,
+                null,
+                null,
+                10,
+                -1
+        );
+
+        assertEquals(3, record.evidenceCandidateCount());
+        assertEquals(1, record.evidenceBlockCount());
+        assertEquals(1, record.evidenceBlocks().size());
+        assertTrue(String.valueOf(record.evidenceBlocks().get(0).get("content_preview")).endsWith("..."));
     }
 }