Add missing JSpecify @nullable (#179)

Author: rbygrave

avaje-config/src/main/java/io/avaje/config/InitialLoadContext.java

@@ -1,6 +1,7 @@
 package io.avaje.config;
 
 import io.avaje.config.CoreEntry.CoreMap;
+import org.jspecify.annotations.Nullable;
 
 import java.io.*;
 import java.lang.System.Logger.Level;
@@ -81,6 +82,7 @@ static String podService(String podName) {
  /**
  * Return the input stream (maybe null) for the given source.
  */
+ @Nullable
  InputStream resource(String resourcePath, InitialLoader.Source source) {
  InputStream is = null;
  if (source == InitialLoader.Source.RESOURCE) {

avaje-config/src/main/java/io/avaje/config/InitialLoader.java

@@ -197,8 +197,7 @@ private void loadViaIndirection() {
  }
  }
 
- @Nullable
- private String[] profiles() {
+ private String@Nullable[] profiles() {
  final String paths = loadContext.profiles();
  return paths == null ? null : splitPaths(paths);
  }
@@ -321,6 +320,7 @@ boolean loadProperties(String resourcePath, Source source) {
  return false;
  }
 
+ @Nullable
  private InputStream resource(String resourcePath, Source source) {
  return loadContext.resource(resourcePath, source);
  }