application restructuring, added crc check when decoding yenc files

package-lock.json

@@ -10,6 +10,7 @@
       "license": "ISC",
       "dependencies": {
         "bullmq": "^5.77.3",
+        "crc": "^4.3.2",
         "dotenv": "^16.3.1",
         "ioredis": "^5.3.2",
         "log4js": "^6.9.1",
@@ -225,7 +226,7 @@
         "readable-stream": "^3.4.0"
       }
     },
-    "node_modules/buffer": {
+    "node_modules/bl/node_modules/buffer": {
       "version": "5.7.1",
       "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.7.1.tgz",
       "integrity": "sha512-EHcyIPBQ4BSGlvjB16k5KgAJ27CIsHY/2JBmCRReo48y9rQ3MaUzWX3KVlBa4U7MyX02HdVj0K7C3WaB3ju7FQ==",
@@ -249,6 +250,32 @@
         "ieee754": "^1.1.13"
       }
     },
+    "node_modules/buffer": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-6.0.3.tgz",
+      "integrity": "sha512-FTiCpNxtwiZZHEZbcbTIcZjERVICn9yq/pDFkTl95/AxzD1naBctN7YO68riM/gLSDY7sdrMby8hofADYuuqOA==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ],
+      "license": "MIT",
+      "optional": true,
+      "peer": true,
+      "dependencies": {
+        "base64-js": "^1.3.1",
+        "ieee754": "^1.2.1"
+      }
+    },
     "node_modules/bullmq": {
       "version": "5.77.3",
       "resolved": "https://registry.npmjs.org/bullmq/-/bullmq-5.77.3.tgz",
@@ -304,6 +331,23 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/crc": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/crc/-/crc-4.3.2.tgz",
+      "integrity": "sha512-uGDHf4KLLh2zsHa8D8hIQ1H/HtFQhyHrc0uhHBcoKGol/Xnb+MPYfUMw7cvON6ze/GUESTudKayDcJC5HnJv1A==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "peerDependencies": {
+        "buffer": ">=6.0.3"
+      },
+      "peerDependenciesMeta": {
+        "buffer": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/cron-parser": {
       "version": "4.9.0",
       "resolved": "https://registry.npmjs.org/cron-parser/-/cron-parser-4.9.0.tgz",