feat: use AprilTag instead of QR code

priv/repo/migrations/20250914160354_migrate_qr_to_apriltag.exs

@@ -0,0 +1,35 @@
+defmodule ComponentsElixir.Repo.Migrations.MigrateQrToApriltag do
+  use Ecto.Migration
+
+  def up do
+    # Rename qr_code column to qr_code_old for backup
+    rename table(:storage_locations), :qr_code, to: :qr_code_old
+
+    # Add new apriltag_id column as integer
+    alter table(:storage_locations) do
+      add :apriltag_id, :integer
+    end
+
+    # Create unique index for apriltag_id
+    create unique_index(:storage_locations, [:apriltag_id])
+
+    # Add constraint to ensure apriltag_id is in valid range (0-586 for tag36h11)
+    create constraint(:storage_locations, :apriltag_id_range, check: "apriltag_id >= 0 AND apriltag_id <= 586")
+
+    # Note: We keep qr_code_old for now in case we need to rollback
+    # It can be removed in a future migration after confirming everything works
+  end
+
+  def down do
+    # Remove apriltag_id column and constraints
+    drop constraint(:storage_locations, :apriltag_id_range)
+    drop unique_index(:storage_locations, [:apriltag_id])
+
+    alter table(:storage_locations) do
+      remove :apriltag_id
+    end
+
+    # Rename back to qr_code
+    rename table(:storage_locations), :qr_code_old, to: :qr_code
+  end
+end

priv/repo/migrations/20250914164314_drop_qr_code_old_column.exs

@@ -0,0 +1,18 @@
+defmodule ComponentsElixir.Repo.Migrations.DropQrCodeOldColumn do
+  use Ecto.Migration
+
+  def up do
+    # Drop the qr_code_old column since we've fully migrated to AprilTags
+    alter table(:storage_locations) do
+      remove :qr_code_old
+    end
+  end
+
+  def down do
+    # If we need to rollback, re-add the qr_code_old column
+    # Note: This will not restore the original data
+    alter table(:storage_locations) do
+      add :qr_code_old, :string, null: false, default: ""
+    end
+  end
+end