fix(data ingest): #197 review follow-ups — picker crash + README/help/label

README.md

@@ -56,7 +56,7 @@ irm https://github.com/tracebloc/cli/releases/latest/download/install.ps1 | iex
 tracebloc data ingest ./my-data \
  --name cats_dogs_train \
  --task image_classification \
- --split train \
+ --intent train \
  --label-column label
 ```
 

internal/cli/data.go

@@ -261,7 +261,7 @@ Exit codes:
 	// schema validator catches missing/empty values with the canonical
 	// JSON-pointer-anchored error.
 	cmd.Flags().StringVar(&name, "name", "",
- "a name for this dataset (letters, digits, underscore) — you'll reference it by this name when you start a training run")
+ "a name for this dataset — start with a letter or underscore, then letters/digits/underscores — you'll reference it by this name when you start a training run")
 	cmd.Flags().StringVar(&tableAlias, "table", "",
  "deprecated alias for --name")
 	_ = cmd.Flags().MarkHidden("table")

internal/cli/interactive.go

@@ -123,9 +123,9 @@ func runInteractive(p *ui.Printer, pr prompter, a *runDataIngestArgs, taskSet bo
 	// (b) name — no auto-fill: the example lives in the hint, so the user
 	// types their own name rather than editing a pre-filled default.
 	if a.Spec.Table == "" {
- p.PromptHint("A name for this dataset — you'll reference it by this name when you start a training run. Letters, digits, underscores. e.g. churn_train")
+ p.PromptHint("A name for this dataset — you'll reference it by this name when you start a training run. Start with a letter or underscore, then letters, digits, underscores. e.g. churn_train")
  ans, err := pr.Input("What should we call this dataset?",
- "MySQL identifier + PVC subdir; letters, digits, underscore only", "",
+ "MySQL identifier + PVC subdir; start with a letter or underscore, then letters, digits, underscore", "",
  push.ValidateTableName)
  if err != nil {
  return err