feat: move node-type-registry to packages/ and add column-ref annotations

- Move graphql/node-type-registry → packages/node-type-registry (platform-level
  package, not graphql-specific)
- Add format: "column-ref" JSON Schema annotations to all parameter_schema
  properties that reference table column names across all node types:
  - Authz*: entity_field, is_published_field, published_at_field, valid_from_field,
    valid_until_field, array_field, anchor_field, owner_field, obj_field, etc.
  - Data*: field_name, owner_field_name, entity_field_name, target, source_fields,
    parent_fk_field, role_key_field_name, condition_field, watch_fields, etc.
  - Search*: field_name, source_fields, source_geom_field, source_fk_field, etc.
  - Relation*: field_name, source_field_name, target_field_name
  - View*: group_by_fields, field_names, primary_columns, primary_field, join_field
- Update codegen header comments to reflect new packages/ path

These annotations enable the constructive-db SQL codegen to distinguish column
references from config values, supporting generic policy column resolution for
the embedding_chunks trigger fix (issue #767).

Author: pyramation