[Enh]: Additional `template` properties to `autoentities`

[JerryNixon]

What

Today, autoentities.template is missing our newest metadata-driven properties, such as description.

This enhancement depends on the following:

• [Enh]: Support autoentities #2794
• [Enh]: support the @db() replacement function for metadata. #2940

New properties

This uses the new @db() syntax but behaves differently. Because internal macros like {schema}, {object}, and {column} are resolved dynamically within the auto-entity generation loop, these replacements cannot occur at config load time (like normal @db() resolution). Instead, they must be evaluated after the auto-generated entities have been expanded.

{
  "template": {
    "description": "@db('{schema}.{object}:MS_Description')", // new (table-level)
    "source": {
      "parameters": {
        "description": "@db('{schema}.{object}.@{column}:MS_Description')" // new (parameter-level)
      }
    },
    "fields": {
      "description": "@db('{schema}.{object}.{column}:MS_Description')" // new (column-level)
    }
  }
}