Fix build failures, add comments

Author: tstirrat15

build.gradle

@@ -66,19 +66,25 @@ signing {
   sign publishing.publications.authzed
 }
 
-sourceCompatibility = JavaVersion.VERSION_1_8
-targetCompatibility = JavaVersion.VERSION_1_8
 
 java {
   withJavadocJar()
   withSourcesJar()
+  sourceCompatibility = JavaVersion.VERSION_1_8
+  targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+tasks.sourcesJar {
+  // This is necessary to keep gradle from barking at you
+  // about an implicit dependency between these two tasks.
+  dependsOn tasks.compileJava
 }
 
 // All it does is complain about generated code.
 javadoc { options.addStringOption('Xdoclint:none', '-quiet') }
 
 def grpcVersion = "1.66.0"
-def protocVersion = "4.27.3"
+def protocVersion = "4.27.4"
 def authzedProtoCommit = "v1.35.0"
 def bufDir = "${buildDir}/buf"
 def protocPlatformTag = project.findProperty('protoc_platform') ? ":${protoc_platform}" : ""
@@ -140,6 +146,7 @@ configurations {
     intTestRuntimeOnly.extendsFrom runtimeOnly
 }
 
+// Test things
 dependencies {
   intTestImplementation "junit:junit:4.13.2"
 }