Add retry logic to postgres requests

Maybe solves https://github.com/ajayyy/SponsorBlockServer/issues/487

src/databases/Postgres.ts

@@ -32,6 +32,8 @@ export class Postgres implements IDatabase {
     private poolRead: Pool;
     private lastPoolReadFail = 0;
 
+    private maxTries = 3;
+
     constructor(private config: DatabaseConfig) {}
 
     async init(): Promise<void> {
@@ -94,6 +96,10 @@ export class Postgres implements IDatabase {
 
         Logger.debug(`prepare (postgres): type: ${type}, query: ${query}, params: ${params}`);
 
+        let tries = 0;
+        do {
+            tries++;
+
             try {
                 const queryResult = await this.getPool(type, options).query({ text: query, values: params });
 
@@ -109,12 +115,17 @@ export class Postgres implements IDatabase {
                         return values;
                     }
                     case "run": {
-                    break;
+                        return;
                     }
                 }
             } catch (err) {
-            Logger.error(`prepare (postgres): ${err}`);
+                if (err instanceof Error && err.message.includes("terminating connection due to conflict with recovery")) {
+                    options.useReplica = false;
                 }
+
+                Logger.error(`prepare (postgres) try ${tries}: ${err}`);
+            }
+        } while ((type === "get" || type === "all") && tries < this.maxTries);
     }
 
     private getPool(type: string, options: QueryOption): Pool {