Fix negative default value on models entities_id column

[Herafia]

Checklist before requesting a review

Please delete options that are not relevant.

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.
• This change requires a documentation update.

Description

• It fixes !45445
• Databases upgraded from old datainjection schemas kept a -1 default on
  glpi_plugin_datainjection_models.entities_id, which blocked GLPI 11's
  migration:unsigned_keys. Adds a migration resetting the column default to 0
  (and fixing any remaining -1 rows).

[Rom1-B]

The redundant migrationOneTable() call was removed (per the requested suggestion), but the core fix was not applied: the legacy-data cleanup is still queued with addPostQuery() instead of addPreQuery(). Migration::executeMigration() still processes the changeField()-registered ALTER TABLE before running POST_QUERY entries, so the UPDATE clearing -1 rows still runs after the column is converted to unsigned, and the ordering bug the finding described remains unresolved.