[air] Remove register-image command and docker_image run support

acceptance/experimental/air/config-help/output.txt

@@ -94,7 +94,7 @@ config.compute.priority_class
 
 >>> [CLI] experimental air run -h config.environment.dependencies
 config.environment.dependencies
-  Inline list of packages to install. Not allowed alongside docker_image.
+  Inline list of packages to install. Not allowed alongside unity_catalog_image.
 
   Type:     list of strings
   Required: no
@@ -108,12 +108,12 @@ config.compute.accelerator_type
   Required: no
 
 === conditionally required leaf
->>> [CLI] experimental air run -h config.environment.docker_image.url
-config.environment.docker_image.url
-  Fully qualified image URL, e.g. myregistry.io/team/train:v3.
+>>> [CLI] experimental air run -h config.code_source.type
+config.code_source.type
+  Kind of code source. Must be "snapshot", the only supported type.
 
   Type:     string
-  Required: when environment.docker_image is set
+  Required: when code_source is set
 
 === union field reports both accepted shapes
 >>> [CLI] experimental air run -h config.code_source.snapshot.git.remote

acceptance/experimental/air/config-help/script

@@ -22,7 +22,7 @@ title "leaf field"
 trace $CLI experimental air run -h config.compute.accelerator_type
 
 title "conditionally required leaf"
-trace $CLI experimental air run -h config.environment.docker_image.url
+trace $CLI experimental air run -h config.code_source.type
 
 title "union field reports both accepted shapes"
 trace $CLI experimental air run -h config.code_source.snapshot.git.remote

acceptance/experimental/air/convert-to-dabs/output.txt

@@ -101,9 +101,3 @@ Unlike `air run` (which submits an ephemeral run), bundle deploy creates a
 persistent job that is not garbage-collected. When you are done, remove the
 job and its uploaded files with:
   [CLI] bundle destroy
-
-=== docker_image is not supported yet
->>> [CLI] experimental air convert-to-dabs docker.yaml --output-dir generated-docker
-Error: environment.docker_image is not yet supported by convert-to-dabs
-
-Exit code: 1

acceptance/experimental/air/convert-to-dabs/script

@@ -15,6 +15,3 @@ errcode trace $CLI experimental air convert-to-dabs train.yaml
 
 title "--force overwrites it"
 trace $CLI experimental air convert-to-dabs train.yaml --force
-
-title "docker_image is not supported yet"
-errcode trace $CLI experimental air convert-to-dabs docker.yaml --output-dir generated-docker

acceptance/experimental/air/help/output.txt

@@ -15,7 +15,6 @@ Available Commands:
   get             Show status, configuration, and timing details for a specific run
   list            List your active runs for the current profile (use --all-status for finished runs)
   logs            Stream or fetch logs for a run
-  register-image  Mirror a Docker image into the workspace registry
   run             Submit a training workload from a YAML config
 
 Flags:

experimental/air/cmd/air.go

@@ -25,9 +25,6 @@ experimental and may change in future versions.`,
 	cmd.AddCommand(newListCommand())
 	cmd.AddCommand(newLogsCommand())
 	cmd.AddCommand(newCancelCommand())
-	registerImageCommand := newRegisterImageCommand()
-	wrapRunErrorWithDebugTip(registerImageCommand)
-	cmd.AddCommand(registerImageCommand)
 	cmd.AddCommand(newConvertToDabsCommand())
 
 	return cmd

experimental/air/cmd/air_test.go

@@ -16,7 +16,7 @@ func TestNewRegistersAllSubcommands(t *testing.T) {
 		registered[c.Name()] = true
 	}
 
-	want := []string{"run", "get", "list", "logs", "cancel", "register-image", "convert-to-dabs"}
+	want := []string{"run", "get", "list", "logs", "cancel", "convert-to-dabs"}
 	for _, name := range want {
 		assert.True(t, registered[name], "subcommand %q is not registered", name)
 	}

experimental/air/cmd/convert_to_dabs.go

@@ -118,14 +118,10 @@ func convertToDabs(ctx context.Context, cfg *runConfig, configPath, bundleDir st
 	// idempotency_token is intentionally not mapped: it dedups a single runs/submit
 	// call, which has no analogue for a persistent, repeatedly-runnable bundle job.
 	//
-	// usage_policy_name resolution is not ported (mirrors the submit path), and
-	// docker images have no ai_runtime_task representation yet.
+	// usage_policy_name resolution is not ported (mirrors the submit path).
 	if cfg.UsagePolicyName != nil {
 		return nil, nil, errors.New("usage_policy_name is not yet supported by convert-to-dabs")
 	}
-	if cfg.Environment != nil && cfg.Environment.DockerImage != nil {
-		return nil, nil, errors.New("environment.docker_image is not yet supported by convert-to-dabs")
-	}
 	if snap := codeSnapshot(cfg); snap != nil {
 		// remote_volume points the code archive at a specific UC Volume. The bundle's
 		// artifact location is set bundle-wide via workspace.artifact_path, not