feat: Implement database initialization script to create ai_supplier_context and session_snapshots tables on application startup.

scripts/db-init.js

@@ -0,0 +1,78 @@
+import { migrate } from "drizzle-orm/node-postgres/migrator";
+import { drizzle } from "drizzle-orm/node-postgres";
+import { Pool } from "pg";
+import * as schema from "../src/db/schema";
+import fs from "fs";
+import path from "path";
+
+async function main() {
+    console.log("[DB Init] Starting database migration & initialization...");
+    let connectionString = process.env.DATABASE_URL;
+
+    try {
+        const CONFIG_PATH = path.join(process.cwd(), "data", ".db-config.json");
+        if (fs.existsSync(CONFIG_PATH)) {
+            const config = JSON.parse(fs.readFileSync(CONFIG_PATH, "utf-8"));
+            if (config.url) {
+                connectionString = config.url;
+                console.log("[DB Init] Found connection string in data/.db-config.json");
+            }
+        }
+    } catch (e) {
+        console.error("[DB Init] Error reading .db-config.json", e);
+    }
+
+    if (!connectionString) {
+        console.warn("[DB Init] No DATABASE_URL found in env or config. Skipping push.");
+        process.exit(0);
+    }
+
+    try {
+        const tempPool = new Pool({ connectionString, max: 1 });
+        const tempDb = drizzle(tempPool, { schema });
+
+        console.log("[DB Init] Connection established. Running migrations...");
+
+        // Note: For Drizzle without pre-generated SQL migrations (using drizzle-kit push in dev), 
+        // running migrations programmatically requires the generated sql files.
+        // Since we want to auto-create tables without requiring dev dependencies in production, 
+        // we will create the specific missing table `ai_supplier_context` directly if it doesn't exist to ensure the app works.
+        // A full robust migration system would use `npx drizzle-kit push` but that is not available in the standalone build easily.
+
+        await tempPool.query(`
+            CREATE TABLE IF NOT EXISTS "ai_supplier_context" (
+                "code_fournisseur" varchar(20) PRIMARY KEY NOT NULL,
+                "context" text NOT NULL,
+                "updated_at" timestamp DEFAULT now()
+            );
+        `);
+        console.log("[DB Init] Table ai_supplier_context is verified/created.");
+
+
+        await tempPool.query(`
+            CREATE TABLE IF NOT EXISTS "session_snapshots" (
+                "id" serial PRIMARY KEY NOT NULL,
+                "user_id" integer,
+                "code_fournisseur" varchar(20) NOT NULL,
+                "nom_fournisseur" varchar(255),
+                "magasin" varchar(20) NOT NULL,
+                "changes" jsonb NOT NULL,
+                "summary_json" jsonb,
+                "label" text,
+                "type" varchar(20) DEFAULT 'snapshot',
+                "created_at" timestamp DEFAULT now()
+            );
+        `);
+        console.log("[DB Init] Table session_snapshots is verified/created.");
+
+        await tempPool.end();
+        console.log("[DB Init] Initialization successful. Exiting.");
+        process.exit(0);
+    } catch (error) {
+        console.error("[DB Init] Initialization failed:", error);
+        // Do not crash the app, just let it run (it uses fallback JSON anyway)
+        process.exit(0);
+    }
+}
+
+main();