fix(embed): make session maxDuration env-configurable via QMD_EMBED_MAX_DURATION_MS (#673)

CHANGELOG.md

@@ -2,6 +2,18 @@
 
 ## [Unreleased]
 
+### Fixed
+
+- The embed session `maxDuration` is now env-configurable via
+  `QMD_EMBED_MAX_DURATION_MS` (default: 30 min). This prevents large-corpus
+  embeddings from being aborted by the hardcoded 30-minute ceiling (#673).
+- **build**: Remove `shell: true` from `spawnSync` in `scripts/build.mjs`. On
+  Windows, passing `shell: true` caused `cmd.exe` to misparse `process.execPath`
+  when the Node.js installation path contains spaces (e.g.
+  `C:\Program Files\nodejs\node.exe`). Since `run()` always receives a real
+  binary path + args array, no shell is needed — `spawnSync` can spawn
+  executables directly. (#681)
+
 ## [2.5.3] - 2026-05-28
 
 ### Features

src/store.ts

@@ -1824,7 +1824,7 @@ export async function generateEmbeddings(
     }
 
     return { chunksEmbedded, errors: activeErrorCount(), failures: failureList() };
-  }, { maxDuration: 30 * 60 * 1000, name: 'generateEmbeddings' });
+  }, { maxDuration: Number(process.env.QMD_EMBED_MAX_DURATION_MS ?? 30 * 60 * 1000), name: 'generateEmbeddings' });
 
   return {
     docsProcessed: totalDocs,