fix(vue-components): resolve indexed inputs and deduplicate array errors

[MakhBeth]

Indexed inputs such as rows[13].text now resolve schema metadata and render outside form.Array. Registered array fields appear once in form.Errors, with their field label, instead of also appearing as unregistered dotted paths.

• Move array-index stripping into OmegaInput and remove OmegaArray's redundant metadata provider. Preserve the injection used by OmegaTaggedUnion for active-branch metadata.

• Normalize bracket indices to dotted paths when registering, looking up, and unregistering field labels.

• Add regressions for indices 0 and 13, field errors and labels, unmount cleanup, and inputs inside form.Array. Include a patch changeset.

• Add Storybook OmegaForm / Indexed Table: sortable and paginated v-data-table cells use source indices outside form.Array, with Row 14 initially invalid and an inspectable form-values view.

Validation: 9 targeted tests passed across IndexedInputErrors and TaggedUnionBehavior. Focused Vue typecheck of the OmegaForm stories passed. The full package Vue typecheck reports an unrelated error in stories/FixedNuxtErrorBoundary/Demo.vue:40 (TS2345: {} is not assignable to never). The pre-push ship gate passed: pnpm check, pnpm lint, and pnpm test.

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commit: cac0d34