update_table fails in non-English environments: "The language code 1033 is not a valid language for this organization"

**Setup:** Plugin `dataverse` 1.10.0 (claude-plugins-official, Claude Code), CLI `@microsoft/dataverse` 1.0.63 as stdio proxy against the GA endpoint (`/api/mcp`).

**Environment:** Dataverse environment with base language **German (1031)**, English not enabled.

**Repro:**

1. `create_table` with a string column → **works fine**, labels are created correctly in the org's base language.
2. `update_table` on the same table, adding one integer column (with `newDisplayName` supplied) → fails:

> The language code 1033 is not a valid language for this organization (correlation ID: 605c95f8-3792-42fa-9975-d16d0e1b6c45)

**Expected:** Labels for added columns should use the organization's base language, as `create_table` already does.

**Impact:** Adding columns to existing tables is impossible in any organization whose base language is not 1033 (English) — which is the default situation for most non-US customers. Since `create_table` handles the locale correctly, the hardcoded LCID seems specific to the add-column path of `update_table`.

Start with the update_table add-column path and compare its label-language handling with create_table, using the reported German (1031) Dataverse environment and reproduction steps. Confirm the change by adding a column with newDisplayName and verifying that labels use the organization’s base language without the 1033 error.

Written by the indexing model from the issue text.