[UlloaSP]

Every export now writes required schema v2 through local mlschema inference, using training features or a one-row float default. The schema records its source and bounded one-hot separator. Native model names map by name; all other origins map by zero-based feature position, with generated names starting at feature_0. Reports map by output position and use string display labels while the manifest retains verified original label types.

Replace target_name with output-major target_names, with no alias. Validate one unique bounded name per verified output, exclude every target column from training features/schema/samples, and reject target/feature overlap before publication, including overwrite. The manifest records target.names and validates count/uniqueness; the CLI displays it. Shared field/report/mapping validation remains independent of pandas/mlschema on readers.

Compatibility: bundles written by 0.1.0a1 without schema.json, or with schema version 1, are rejected and must be re-exported. The old target.name wire key and target_name export keyword are also rejected. Format version remains 1 because it is not frozen. Package version is 0.1.0a2; this PR does not publish, tag, release or merge it.

Validation:

• Ruff lint and formatting, Pyright, 1543 pytest tests with 91.94% branch coverage, wheel and sdist build.
• Installed mlschema kind/key contract, schema round trips across adapters, positional prediction, one/multiple output targets and all rejection paths.
• Independent review fixed target-overlap publication ordering and preserved the first-separator grouping rule; the second review passed 100 assertions with no important findings.
• Wheel/sdist package bytes and isolated base-wheel import/help/inspect smoke passed with all optional libraries absent.

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