fix(fs): replace execSync and fsync workarounds with atomic async FsHelpers operations to avoid XFS races and shell dependencies

ts/mod_compiler/classes.tscompiler.ts

@@ -1,8 +1,5 @@
 import type { CompilerOptions, Diagnostic, Program } from 'typescript';
 import typescript from 'typescript';
-import * as fs from 'fs';
-import * as path from 'path';
-import { execSync } from 'child_process';
 import * as smartdelay from '@push.rocks/smartdelay';
 import * as smartpromise from '@push.rocks/smartpromise';
 import * as smartpath from '@push.rocks/smartpath';
@@ -370,18 +367,7 @@ export class TsCompiler {
 
       // Perform unpack if compilation succeeded
       if (result.errorSummary.totalErrors === 0) {
-        // Force XFS to commit all pending directory entries before unpacking.
-        // TypeScript's writeFileSync creates entries that may reside in XFS's
-        // delayed log. Without sync, readdir can return partial results.
-        execSync('sync');
-        this.syncDirectoryTree(destDir);
-
-        try {
-          await performUnpack(pattern, destDir, this.cwd);
-        } catch (unpackErr: any) {
-          console.error(`   ⚠️ Unpack error for ${destPath}: ${unpackErr.message}`);
-        }
-
+        await performUnpack(pattern, destDir, this.cwd);
         successfulOutputDirs.push(destDir);
       }
 
@@ -504,27 +490,6 @@ export class TsCompiler {
     return success;
   }
 
-  /**
-   * Recursively fsync all directories in a tree.
-   * Forces XFS to commit pending directory entries from its log.
-   */
-  private syncDirectoryTree(dirPath: string): void {
-    try {
-      const fd = fs.openSync(dirPath, 'r');
-      fs.fsyncSync(fd);
-      fs.closeSync(fd);
-
-      const entries = fs.readdirSync(dirPath, { withFileTypes: true });
-      for (const entry of entries) {
-        if (entry.isDirectory()) {
-          this.syncDirectoryTree(path.join(dirPath, entry.name));
-        }
-      }
-    } catch {
-      // Ignore errors (directory may not exist)
-    }
-  }
-
   /**
    * Merge multiple error summaries into one
    */