Scaffold cameleer3-server project structure

Multi-module Maven project (server-core + server-app) with Spring Boot 3.4.3,
Gitea CI workflow, and dependency on cameleer3-common from Gitea Maven registry.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cameleer3-server-core/pom.xml

@@ -0,0 +1,32 @@
+<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>com.cameleer3</groupId>
+        <artifactId>cameleer3-server-parent</artifactId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <artifactId>cameleer3-server-core</artifactId>
+    <name>Cameleer3 Server Core</name>
+    <description>Domain logic, storage, and agent registry</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.cameleer3</groupId>
+            <artifactId>cameleer3-common</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>