fix(config): apply aliases after ConfigData

cdc-service/src/main/java/com/xtrmetl/cdc/config/MightyEtlConfigAliasEnvironmentPostProcessor.java

@@ -1,8 +1,8 @@
 package com.xtrmetl.cdc.config;
 
 import org.springframework.boot.SpringApplication;
+import org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor;
 import org.springframework.boot.env.EnvironmentPostProcessor;
-import org.springframework.core.Ordered;
 import org.springframework.core.annotation.Order;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MapPropertySource;
@@ -24,7 +24,7 @@
  *
  * <p>Not a full recursive alias of every key — only known product properties.</p>
  */
-@Order(Ordered.HIGHEST_PRECEDENCE + 10)
+@Order(ConfigDataEnvironmentPostProcessor.ORDER + 1)
 public class MightyEtlConfigAliasEnvironmentPostProcessor implements EnvironmentPostProcessor {
 
     public static final String PROPERTY_SOURCE_NAME = "mightyetl-xtrmetl-aliases";

cdc-service/src/main/resources/META-INF/spring.factories

@@ -0,0 +1,2 @@
+org.springframework.boot.env.EnvironmentPostProcessor=\
+com.xtrmetl.cdc.config.MightyEtlConfigAliasEnvironmentPostProcessor

cdc-service/src/test/java/com/xtrmetl/cdc/config/MightyEtlConfigAliasEnvironmentPostProcessorTest.java

@@ -1,8 +1,17 @@
 package com.xtrmetl.cdc.config;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.springframework.boot.Banner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
 import org.springframework.mock.env.MockEnvironment;
 
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -34,10 +43,37 @@ void legacyOnlyIsMirroredToModern() {
         assertFalse(aliases.containsKey("xtrmetl.replica.enabled"));
     }
 
+    @Test
+    void modernConfigDataWinsOverLegacyConfigData(@TempDir Path tempDir) throws IOException {
+        Path configFile = tempDir.resolve("application.properties");
+        Files.writeString(configFile, """
+                mightyetl.cdc.autostart=false
+                xtrmetl.cdc.autostart=true
+                """);
+
+        SpringApplication application = new SpringApplication(AliasOrderProbeConfiguration.class);
+        application.setBannerMode(Banner.Mode.OFF);
+        application.setWebApplicationType(WebApplicationType.NONE);
+
+        try (ConfigurableApplicationContext context = application.run(
+                "--spring.config.location=" + configFile.toUri()
+        )) {
+            assertTrue(context.getEnvironment().getPropertySources().contains(
+                    MightyEtlConfigAliasEnvironmentPostProcessor.PROPERTY_SOURCE_NAME
+            ));
+            assertEquals("false", context.getEnvironment().getProperty("mightyetl.cdc.autostart"));
+            assertEquals("false", context.getEnvironment().getProperty("xtrmetl.cdc.autostart"));
+        }
+    }
+
     @Test
     void emptyWhenNeitherPrefixSet() {
         MockEnvironment env = new MockEnvironment();
         Map<String, Object> aliases = MightyEtlConfigAliasEnvironmentPostProcessor.buildAliases(env);
         assertTrue(aliases.isEmpty());
     }
+
+    @Configuration(proxyBeanMethods = false)
+    static class AliasOrderProbeConfiguration {
+    }
 }

etl-service/src/main/java/com/xtrmetl/etl/config/MightyEtlConfigAliasEnvironmentPostProcessor.java

@@ -1,8 +1,8 @@
 package com.xtrmetl.etl.config;
 
 import org.springframework.boot.SpringApplication;
+import org.springframework.boot.context.config.ConfigDataEnvironmentPostProcessor;
 import org.springframework.boot.env.EnvironmentPostProcessor;
-import org.springframework.core.Ordered;
 import org.springframework.core.annotation.Order;
 import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MapPropertySource;
@@ -18,7 +18,7 @@
  * <p>Only explicitly supported product keys are mirrored. See
  * {@code docs/rebrand-name-matrix.md} for compatibility boundaries.</p>
  */
-@Order(Ordered.HIGHEST_PRECEDENCE + 10)
+@Order(ConfigDataEnvironmentPostProcessor.ORDER + 1)
 public class MightyEtlConfigAliasEnvironmentPostProcessor implements EnvironmentPostProcessor {
 
     /** Name of the highest-precedence synthetic alias property source. */

etl-service/src/main/resources/META-INF/spring.factories

@@ -0,0 +1,2 @@
+org.springframework.boot.env.EnvironmentPostProcessor=\
+com.xtrmetl.etl.config.MightyEtlConfigAliasEnvironmentPostProcessor

etl-service/src/test/java/com/xtrmetl/etl/config/MightyEtlConfigAliasEnvironmentPostProcessorTest.java

@@ -1,8 +1,17 @@
 package com.xtrmetl.etl.config;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.springframework.boot.Banner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Configuration;
 import org.springframework.mock.env.MockEnvironment;
 
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Map;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
@@ -66,8 +75,41 @@ void modernValueWinsWhenBothNamespacesAreSet() {
         assertEquals("4096", aliases.get("xtrmetl.etl.max-payload-bytes"));
     }
 
+    @Test
+    void modernConfigDataWinsOverLegacyConfigData(@TempDir Path tempDir) throws IOException {
+        Path configFile = tempDir.resolve("application.properties");
+        Files.writeString(configFile, """
+                mightyetl.etl.max-payload-bytes=4096
+                xtrmetl.etl.max-payload-bytes=1024
+                """);
+
+        SpringApplication application = new SpringApplication(AliasOrderProbeConfiguration.class);
+        application.setBannerMode(Banner.Mode.OFF);
+        application.setWebApplicationType(WebApplicationType.NONE);
+
+        try (ConfigurableApplicationContext context = application.run(
+                "--spring.config.location=" + configFile.toUri()
+        )) {
+            assertTrue(context.getEnvironment().getPropertySources().contains(
+                    MightyEtlConfigAliasEnvironmentPostProcessor.PROPERTY_SOURCE_NAME
+            ));
+            assertEquals(
+                    "4096",
+                    context.getEnvironment().getProperty("mightyetl.etl.max-payload-bytes")
+            );
+            assertEquals(
+                    "4096",
+                    context.getEnvironment().getProperty("xtrmetl.etl.max-payload-bytes")
+            );
+        }
+    }
+
     @Test
     void emptyWhenUnset() {
         assertTrue(MightyEtlConfigAliasEnvironmentPostProcessor.buildAliases(new MockEnvironment()).isEmpty());
     }
+
+    @Configuration(proxyBeanMethods = false)
+    static class AliasOrderProbeConfiguration {
+    }
 }