fix(detection): fix TopicLinker SENDS_TO gap, ConfigDefDetector, KafkaDetector Kotlin, ReactComponentDetector RENDERS scoping

[aksOps]

Summary

Fixes 4 detection quality issues identified in the CTO code review (RAN-82):

• TopicLinker: Added SENDS_TO/RECEIVES_FROM edge support so enterprise messaging patterns (TIBCO EMS, IBM MQ, Azure Messaging) get cross-linked across services, same as Kafka PRODUCES/CONSUMES
• ConfigDefDetector: Implemented actual @Value("${...}") and @ConfigurationProperties(prefix="...") detection — these were advertised in the description but completely unimplemented; Kafka ConfigDef.define() still works as before
• KafkaDetector: Added "kotlin" to getSupportedLanguages() — Kotlin/Spring Kafka codebases using @KafkaListener and KafkaTemplate now get messaging coverage
• ReactComponentDetector: Fixed RENDERS edge false positives in multi-component files by scoping JSX tag search to each component's body section (match position → next component's position) instead of scanning the whole file

Test plan

• TopicLinkerTest — 6 tests pass (2 new: SENDS_TO/RECEIVES_FROM, mixed edge kinds)
• ReactComponentDetectorTest — 5 tests pass (2 new: scoped RENDERS, single component all tags)
• JavaDetectorsTest$ConfigDefTests — 6 tests pass (3 new: @Value, @ConfigurationProperties, determinism)
• JavaDetectorsTest$KafkaTests — 5 tests pass (2 new: Kotlin @KafkaListener, Kotlin KafkaTemplate)
• All targeted Java tests pass locally

Note: Frontend build currently fails on CodeGraphView.tsx TypeScript errors that are pre-existing in the working tree from other in-progress frontend work — not caused by this PR. Flagging for @cto attention.

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[aksOps]

Performance Fixes Added (RAN-81)

Added four Neo4j query performance fixes to this branch:

• Fulltext index: EnrichCommand now creates FULLTEXT INDEX nodeSearchIndex on CodeNode[label, fqn]. Both search() overloads rewritten to use db.index.fulltext.queryNodes — no more full node-store CONTAINS scans.
• N+1 eliminated in findRelatedEndpoints(): New GraphStore.findEndpointNeighborsBatch() resolves all endpoint neighbors for up to 50 node IDs in a single UNWIND query. Down from 51 transactions to 2.
• computeGraphStats() single transaction: All 3 count queries (nodes, edges, files) now share one Neo4j transaction.
• @Cacheable on consumersOf, callersOf, findComponentByFile, findRelatedEndpoints: All read-only, safe to cache.

Commit: 8c021b1
All 1475 tests pass.

[sonarqubecloud]

Quality Gate failed

Failed conditions
1 Security Hotspot
72.1% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud

[aksOps]

Code review

Found 1 issue:

1. buildTreeOutput never sets the path field on tree nodes — the frontend FileTreeNode type (defined in src/main/frontend/src/types/api.ts) declares path: string as a required field, and ProjectFileTree.tsx uses it extensively for expand-state tracking, keyboard navigation, and selection (expanded.has(node.path), onFocus(node.path), data-testid). The backend only puts name, type, nodeCount, and children — path is never set, so every consumer gets undefined for this field and the tree component breaks at runtime.

https://github.com/RandomCodeSpace/code-iq/blob/46fd2b00eeaf55444f3d4253a984ea24ff1a6107/src/main/java/io/github/randomcodespace/iq/query/QueryService.java#L383-L401

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[aksOps]

Code review

Found 2 issues:

1. ReactComponentDetector: intra-file RENDERS edges are always dropped — The fix scopes JSX search to each component's body section, but the filter if (!allDetected.contains(tag)) excludes ALL components and hooks defined in the same file, not just self-references. If App renders Button and both are in the same file, the App → Button RENDERS edge is silently dropped. The guard should be !tag.equals(comp.name()) to exclude only self-renders while preserving sibling relationships.

https://github.com/RandomCodeSpace/code-iq/blob/46fd2b00eeaf55444f3d4253a984ea24ff1a6107/src/main/java/io/github/randomcodespace/iq/detector/frontend/ReactComponentDetector.java#L148-L154

2. KafkaDetector: Kotlin object declarations are silently ignored — CLASS_RE ((?:public\s+)?class\s+(\w+)) only matches the class keyword. Kotlin object OrderConsumer — a common singleton/service pattern in Kotlin Spring Kafka codebases — is never matched. When no class name is found, the detector returns DetectorResult.empty(), silently producing no results for the entire file. The detector now declares Kotlin support in getSupportedLanguages() but does not cover this case. Per CLAUDE.md: "Generic detection — Not example-specific: Every feature must work for ALL languages and architectures."

https://github.com/RandomCodeSpace/code-iq/blob/46fd2b00eeaf55444f3d4253a984ea24ff1a6107/src/main/java/io/github/randomcodespace/iq/detector/java/KafkaDetector.java#L30-L34

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[aksOps]

Closed — changes manually merged to main via conflict resolution commit. The detection quality fixes (TopicLinker, ConfigDefDetector, KafkaDetector Kotlin, ReactComponentDetector RENDERS) and perf improvements are now in main.