feat: log entitlement purchases (#3)

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Reviewed-on: #3
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

package.json

@@ -22,6 +22,7 @@
 		"typescript": "5.7.3"
 	},
 	"dependencies": {
+		"discord-verify": "1.2.0",
 		"fastify": "5.2.1",
 		"nodemailer": "6.10.0"
 	}