Initial commit: trueref v0.1.0-SNAPSHOT

Java 21 / Spring Boot 3.5.3 multi-module Maven project.
Hybrid BM25+HNSW search with RRF, cross-encoder reranker,
ONNX Runtime 1.22.0 (CPU + CUDA 12 GPU variants).

trueref-domain/pom.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.trueref</groupId>
+        <artifactId>trueref-parent</artifactId>
+        <version>0.1.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>trueref-domain</artifactId>
+    <name>trueref-domain</name>
+    <description>Pure domain model + ports. No Spring, no I/O, no third-party libs beyond JSpecify.</description>
+
+    <!-- Hexagonal contract: domain has ZERO runtime dependencies beyond JSpecify (annotations only). -->
+    <dependencies>
+        <!-- inherits jspecify + test deps from parent -->
+    </dependencies>
+</project>