PGvector vector database support (#3788)

* PGVector support for vector db storage

* forgot files

* comments

* dev build

* Add ENV connection and table schema validations for vector table
add .reset call to drop embedding table when changing the AnythingLLM embedder
update instrutions
Add preCheck error reporting in UpdateENV
add timeout to pg connection

* update setup

* update README

* update doc

server/models/systemSettings.js

@@ -7,6 +7,7 @@ const { isValidUrl, safeJsonParse } = require("../utils/http");
 const prisma = require("../utils/prisma");
 const { v4 } = require("uuid");
 const { MetaGenerator } = require("../utils/boot/MetaGenerator");
+const { PGVector } = require("../utils/vectorDbProviders/pgvector");
 
 function isNullOrNaN(value) {
   if (value === null) return true;
@@ -427,6 +428,10 @@ const SystemSettings = {
       // AstraDB Keys
       AstraDBApplicationToken: process?.env?.ASTRA_DB_APPLICATION_TOKEN,
       AstraDBEndpoint: process?.env?.ASTRA_DB_ENDPOINT,
+
+      // PGVector Keys
+      PGVectorConnectionString: !!PGVector.connectionString() || false,
+      PGVectorTableName: PGVector.tableName(),
     };
   },