Added new end point, edited getEmails to be Async all and return 202 status code

src/main/java/com/safeqr/app/gmail/entity/GmailCidEntity.java

@@ -0,0 +1,40 @@
+package com.safeqr.app.gmail.entity;
+
+import com.safeqr.app.qrcode.entity.QRCodeEntity;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import org.hibernate.annotations.UuidGenerator;
+
+import java.util.UUID;
+
+@Entity
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+@Table(name = "gmail_cid", schema = "safeqr")
+public class GmailCidEntity {
+    @Id
+    @GeneratedValue(generator = "UUID")
+    @UuidGenerator
+    @Column(updatable = false, nullable = false)
+    private UUID id;
+
+    @Column(name = "gmail_id")
+    private UUID gmailId;
+
+    @Column(name = "cid")
+    private String cid;
+
+    @Column(name = "attachment_id")
+    private String attachmentId;
+
+    @Column(name = "decoded_content")
+    private String decodedContent;
+
+    @Column(name = "qr_code_id")
+    private UUID qrCodeId;
+}