feat: 新增 SQL 联邦查询与数据库适配底座

- 提供统一编译、逻辑表映射与单源/联邦自动路由

- 增加有界执行、查询生命周期、统计成本优化与执行分析

- 内置 MySQL 与 PostgreSQL JDBC 适配和统计采集

easy-agents-federation-sql/easy-agents-federation-sql-adapter-jdbc/pom.xml

@@ -0,0 +1,52 @@
+<?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.easyagents</groupId>
+        <artifactId>easy-agents-federation-sql</artifactId>
+        <version>${revision}</version>
+    </parent>
+
+    <artifactId>easy-agents-federation-sql-adapter-jdbc</artifactId>
+    <name>easy-agents-federation-sql-adapter-jdbc</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.easyagents</groupId>
+            <artifactId>easy-agents-federation-sql-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.calcite</groupId>
+            <artifactId>calcite-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <version>8.4.0</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.7.5</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>