refactor: Update Project model to include new v1.0 slsa field changes

Resolves #81 (closed)

efservices/src/main/java/org/eclipsefoundation/efservices/api/models/Project.java

@@ -69,7 +69,7 @@ public abstract class Project {
 
     public abstract String getTopLevelProject();
 
-    public abstract String getSlsaLevel();
+    public abstract Slsa getSlsa();
 
     @Memoized
     public Optional<Collaboration> getSpecWorkingGroup() {
@@ -143,7 +143,7 @@ public abstract class Project {
 
         public abstract Builder setTopLevelProject(String project);
 
-        public abstract Builder setSlsaLevel(String level);
+        public abstract Builder setSlsa(Slsa slsa);
 
         public abstract Project build();
     }
@@ -307,4 +307,24 @@ public abstract class Project {
             public abstract Release build();
         }
     }
+
+    @AutoValue
+    @JsonDeserialize(builder = AutoValue_Project_Slsa.Builder.class)
+    public abstract static class Slsa {
+
+        public abstract String getBuildLevel();
+
+        public static Builder builder() {
+            return new AutoValue_Project_Slsa.Builder();
+        }
+
+        @AutoValue.Builder
+        @JsonPOJOBuilder(withPrefix = "set")
+        public abstract static class Builder {
+
+            public abstract Builder setBuildLevel(String buildLevel);
+
+            public abstract Slsa build();
+        }
+    }
 }