refactor(formatters,cli): replace eslint-disable with Number() coercion; simplify readFileDescriptor

Replace no-unsafe-enum-comparison suppression comments in junit.ts and
markdown.ts with Number() coercion that makes the intent clear and
satisfies the linter properly. Remove dead Buffer branch in
readFileDescriptor since setEncoding guarantees string chunks.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: kopernic-pl

packages/cli/src/services/linter/utils/readFileDescriptor.ts

@@ -9,10 +9,10 @@ export async function readFileDescriptor(fd: number, opts: IFileReadOptions): Pr
   stream.setEncoding(opts.encoding);
 
   stream.on('readable', () => {
-    let chunk: string | Buffer;
+    let chunk: string;
 
-    while ((chunk = stream.read() as string | Buffer) !== null) {
-      result += typeof chunk === 'string' ? chunk : chunk.toString();
+    while ((chunk = stream.read() as string) !== null) {
+      result += chunk;
     }
   });
 

packages/formatters/src/junit.ts

@@ -48,8 +48,9 @@ export const junit: Formatter = (results, { failSeverity }) => {
     const classname = source.replace(new RegExp(`${escapeRegExp(extname(source))}$`), '');
 
     if (validationResults.length > 0) {
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-enum-comparison
-      const filteredValidationResults = validationResults.filter(result => result.severity <= failSeverity);
+      const filteredValidationResults = validationResults.filter(
+        result => Number(result.severity) <= Number(failSeverity),
+      );
 
       output += `<testsuite package="org.spectral" time="0" tests="${filteredValidationResults.length}" errors="0" failures="${filteredValidationResults.length}" name="${source}">\n`;
 

packages/formatters/src/markdown.ts

@@ -13,8 +13,9 @@ export const markdown: Formatter = (results, { failSeverity }, ctx?: FormatterCo
     validationResults.sort((a, b) => a.range.start.line - b.range.start.line);
 
     if (validationResults.length > 0) {
-      // eslint-disable-next-line @typescript-eslint/no-unsafe-enum-comparison
-      const filteredValidationResults = validationResults.filter(result => result.severity <= failSeverity);
+      const filteredValidationResults = validationResults.filter(
+        result => Number(result.severity) <= Number(failSeverity),
+      );
 
       for (const result of filteredValidationResults) {
         const ruleDocumentationUrl = getRuleDocumentationUrl(result.code, ctx);