optimize auto reload uvicornserver load new vector libs if changed by py

src/Index/IndexMetaManager.php

@@ -106,6 +106,9 @@ final class IndexMetaManager
         $this->atomicWriteJson($this->runtimePath, $payload);
     }
 
+    /**
+     * Für Chunk-Rebuilds (harte Zahl + Commit-Timestamp).
+     */
     public function updateRuntimeStats(int $chunkCount): void
     {
         $this->ensureRuntimeFileExists();
@@ -118,7 +121,40 @@ final class IndexMetaManager
         $this->atomicWriteJson($this->runtimePath, $payload);
     }
 
-    public function getRuntimeChunkCount(): int
+    /**
+     * Enterprise-Commit-Marker für alles, was einen Reload im Vector-Service erfordern soll,
+     * ohne dass zwingend chunk_count aktualisiert werden kann (z.B. Tag-Rebuild).
+     *
+     * Beispiel:
+     *   touchRuntime(['last_tags_rebuild_at' => DATE_ATOM])
+     */
+    public function touchRuntime(array $extra = []): void
+    {
+        $this->ensureRuntimeFileExists();
+
+        $current = $this->readRuntime() ?? [];
+
+        // Grundschema absichern
+        if (!isset($current['chunk_count'])) {
+            $current['chunk_count'] = 0;
+        }
+
+        $payload = array_merge(
+            $current,
+            $extra,
+            [
+                // Commit-Marker IMMER setzen/überschreiben
+                'last_rebuild_at' => (new \DateTimeImmutable())->format(DATE_ATOM),
+            ]
+        );
+
+        $this->atomicWriteJson($this->runtimePath, $payload);
+    }
+
+    /**
+     * Runtime-Info lesen (z.B. für Tests, Debug, Polling).
+     */
+    public function readRuntime(): ?array
     {
         $this->ensureRuntimeFileExists();
 
@@ -127,9 +163,25 @@ final class IndexMetaManager
             true
         );
 
+        return is_array($data) ? $data : null;
+    }
+
+    public function getRuntimeChunkCount(): int
+    {
+        $data = $this->readRuntime();
+
         return (int)($data['chunk_count'] ?? 0);
     }
 
+    public function getRuntimeLastRebuildAt(): ?string
+    {
+        $data = $this->readRuntime();
+
+        $v = $data['last_rebuild_at'] ?? null;
+
+        return is_string($v) && $v !== '' ? $v : null;
+    }
+
     // =====================================================
     // INTERNAL ATOMIC JSON WRITE
     // =====================================================