feat: Reorganizes files.

Sources/App/Controllers/DB/VendorDB.swift

@@ -0,0 +1,47 @@
+import Fluent
+import Vapor
+
+struct VendorDB {
+  func create(_ model: Vendor.Create, on db: any Database) async throws -> Vendor.DTO {
+    let model = model.toModel()
+    try await model.save(on: db)
+    return model.toDTO()
+  }
+
+  func fetchAll(withBranches: Bool? = nil, on db: any Database) async throws -> [Vendor.DTO] {
+    var query = Vendor.query(on: db).sort(\.$name, .ascending)
+    if withBranches == true {
+      query = query.with(\.$branches)
+    }
+    return try await query.all().map { $0.toDTO(includeBranches: withBranches) }
+  }
+
+  func get(id: Vendor.IDValue, withBranches: Bool? = nil, on db: any Database) async throws -> Vendor.DTO? {
+    var query = Vendor.query(on: db).filter(\.$id == id)
+
+    if withBranches == true {
+      query = query.with(\.$branches)
+    }
+    return try await query.first().map { $0.toDTO(includeBranches: withBranches) }
+  }
+
+  func update(
+    id: Vendor.IDValue,
+    with updates: Vendor.Update,
+    on db: any Database
+  ) async throws -> Vendor.DTO {
+    guard let vendor = try await Vendor.find(id, on: db) else {
+      throw Abort(.notFound)
+    }
+    vendor.applyUpdates(updates)
+    return vendor.toDTO()
+  }
+
+  func delete(id: Vendor.IDValue, on db: any Database) async throws {
+    guard let vendor = try await Vendor.find(id, on: db) else {
+      throw Abort(.notFound)
+    }
+    try await vendor.delete(on: db)
+  }
+
+}