Implement async manual CSV ingest, unified UI pagination/filters, and serial placeholder strategy

internal/idgen/generator.go

@@ -10,7 +10,6 @@ import (
 type EntityType string
 
 const (
-	Project       EntityType = "project"
 	Asset         EntityType = "machine" // Renamed from asset
 	Component     EntityType = "part"    // Renamed from component
 	Installation  EntityType = "installation"
@@ -22,7 +21,6 @@ const (
 
 // Prefix mapping for each entity type
 var prefixMap = map[EntityType]string{
-	Project:       "PJ",
 	Asset:         "ME", // Machine
 	Component:     "PT", // Part
 	Installation:  "IN",