Fixes related to config loader

src/config/common.schema.ts

@@ -7,7 +7,15 @@ export const CommonConfigSchema = z.object({
 	serviceName: z.string().default('llm-observability-mcp'),
 	serviceVersion: z.string().default('1.0.0'),
 	environment: z.string().default('development'),
-	debug: z.boolean().default(false),
+	debug: z
+		.preprocess((val) => {
+			if (typeof val === 'string') {
+				if (val.toLowerCase() === 'false') return false;
+				if (val.toLowerCase() === 'true') return true;
+			}
+			return val;
+		}, z.boolean())
+		.default(false),
 	logLevel: z.enum(['debug', 'info', 'warn', 'error']).default('info'),
 });