Iss #141 - Add DB-backed GH installation cache for better uptime

Previously, we cached installation info live at server start, but this had awful performance and due to GH API instability, was not reliable. The new solution should be more stable and better handle disruptions. This will initially be updated hourly by a thread, and in the future will have updates performed by the already configured webhook.

src/main/java/org/eclipsefoundation/git/eca/api/models/GithubApplicationInstallationData.java

@@ -11,6 +11,8 @@
  */
 package org.eclipsefoundation.git.eca.api.models;
 
+import javax.annotation.Nullable;
+
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
 import com.google.auto.value.AutoValue;
@@ -22,8 +24,8 @@ import com.google.auto.value.AutoValue;
  *
  */
 @AutoValue
-@JsonDeserialize(builder = AutoValue_GithubApplicationInstallation.Builder.class)
-public abstract class GithubApplicationInstallation {
+@JsonDeserialize(builder = AutoValue_GithubApplicationInstallationData.Builder.class)
+public abstract class GithubApplicationInstallationData {
 
     public abstract int getId();
 
@@ -31,8 +33,10 @@ public abstract class GithubApplicationInstallation {
 
     public abstract String getTargetId();
 
+    public abstract Account getAccount();
+
     public static Builder builder() {
-        return new AutoValue_GithubApplicationInstallation.Builder();
+        return new AutoValue_GithubApplicationInstallationData.Builder();
     }
 
     @AutoValue.Builder
@@ -44,6 +48,31 @@ public abstract class GithubApplicationInstallation {
 
         public abstract Builder setTargetId(String targetId);
 
-        public abstract GithubApplicationInstallation build();
+        public abstract Builder setAccount(Account account);
+
+        public abstract GithubApplicationInstallationData build();
+    }
+
+    @AutoValue
+    @JsonDeserialize(builder = AutoValue_GithubApplicationInstallationData_Account.Builder.class)
+    public abstract static class Account {
+        public abstract int getId();
+
+        @Nullable
+        public abstract String getLogin();
+
+        public static Builder builder() {
+            return new AutoValue_GithubApplicationInstallationData_Account.Builder();
+        }
+
+        @AutoValue.Builder
+        @JsonPOJOBuilder(withPrefix = "set")
+        public abstract static class Builder {
+            public abstract Builder setId(int id);
+
+            public abstract Builder setLogin(@Nullable String login);
+
+            public abstract Account build();
+        }
     }
 }