fix(vault): only reset enrichment progress on new batch, not mid-drain

Start() is called each drain loop in processBatch to update total.
Only reset done=0 when transitioning from idle→running (new batch),
not when already running (same batch, total growing).

internal/vault/enrich_progress.go

@@ -50,15 +50,18 @@ func (p *EnrichProgress) broadcast(e EnrichEvent) {
 }
 
 // Start signals enrichment with updated total and tenant scope.
-// Resets done counter so the progress bar starts from 0%.
+// Only resets done counter when starting a new batch (was idle).
+// Subsequent calls within the same batch just update the total.
 func (p *EnrichProgress) Start(total int, tenantID uuid.UUID) {
 	p.mu.Lock()
 	defer p.mu.Unlock()
-	p.done = 0
+	if !p.running {
+		p.done = 0
+	}
 	p.total = total
 	p.tenantID = tenantID
 	p.running = true
-	p.broadcast(EnrichEvent{Phase: "enriching", Done: 0, Total: p.total, Running: true})
+	p.broadcast(EnrichEvent{Phase: "enriching", Done: p.done, Total: p.total, Running: true})
 }
 
 // AddDone increments completed count by n and broadcasts progress.