move loading of certs into CertificationDao

OpenKeychain/src/main/sqldelight/org/sufficientlysecure/keychain/Certs.sq

@@ -1,13 +1,20 @@
 -- TODO implement. this is only here for reference in SQLDelight
 CREATE TABLE IF NOT EXISTS certs(
-    master_key_id INTEGER,
-    rank INTEGER,
-    key_id_certifier INTEGER,
-    type INTEGER,
-    verified INTEGER,
-    creation INTEGER,
-    data BLOB,
+    master_key_id INTEGER NOT NULL,
+    rank INTEGER NOT NULL,
+    key_id_certifier INTEGER NOT NULL,
+    type INTEGER NOT NULL,
+    verified INTEGER NOT NULL,
+    creation INTEGER NOT NULL,
+    data BLOB NOT NULL,
     PRIMARY KEY(master_key_id, rank, key_id_certifier),
     FOREIGN KEY(master_key_id) REFERENCES keyrings_public(master_key_id) ON DELETE CASCADE
     -- FOREIGN KEY(master_key_id, rank) REFERENCES user_packets(master_key_id, rank) ON DELETE CASCADE
-);
+);
+
+selectVerifyingCertDetails:
+SELECT master_key_id AS masterKeyId, key_id_certifier AS signerMasterKeyId, creation * 1000 AS creation
+    FROM certs
+    WHERE verified = 1 AND master_key_id = ? AND rank = ?
+    ORDER BY creation DESC
+    LIMIT 1;