docs: cut 6.1.0 versions for docs, admin_docs, developer_docs, components

Snapshots all four versioned Docusaurus sections at v6.1.0. Built on
top of the version-cutting tooling work in chore/docs-cut-6.1.0-versions
so the snapshot benefits from:

- Auto-gen refresh before snapshotting (database pages from engine
  spec metadata, API reference from openapi.json, component pages
  from Storybook stories) — captured at the SHA we cut from rather
  than whatever happened to be on disk.
- Data-import freeze: country list, feature flag table, database
  diagnostics, and component metadata are copied into snapshot-local
  `_versioned_data/` dirs so the historical version doesn't silently
  mutate when the source files change.
- Depth-aware import-path rewriter that handles deeply-nested
  component MDX files referencing `../../../src/` from the snapshot.

Versioning behavior: `lastVersion` stays at `current` for every
section, so the canonical URLs (`/docs/...`, `/admin-docs/...`,
`/developer-docs/...`, `/components/...`) continue to render content
from master. The `current` version is consistently labeled "Next"
with an `unreleased` banner, and `6.1.0` is a historical pin
accessible only via its explicit version segment.

Component playground: previously `disabled: true` in versions-config.json,
now enabled and versioned. The plugin block in docusaurus.config.ts
was already gated only by the `disabled` flag, so no other code
changes were needed to bring it back online.

The frozen `databases.json` in the snapshot is the canonical 80-database
artifact from the latest committed state in master (preserved by the
generator's input-hash cache), not a fallback regenerated from a
local Flask environment.

docs/developer_docs_versioned_docs/version-6.1.0/api/get-a-css-template.StatusCodes.json

@@ -0,0 +1 @@
+{"responses":{"200":{"content":{"application/json":{"schema":{"properties":{"description_columns":{"properties":{"column_name":{"description":"The description for the column name. Will be translated by babel","example":"A Nice description for the column","type":"string"}},"type":"object"},"id":{"description":"The item id","type":"string"},"label_columns":{"properties":{"column_name":{"description":"The label for the column name. Will be translated by babel","example":"A Nice label for the column","type":"string"}},"type":"object"},"result":{"properties":{"changed_by":{"properties":{"first_name":{"maxLength":64,"type":"string"},"id":{"type":"integer"},"last_name":{"maxLength":64,"type":"string"}},"required":["first_name","last_name"],"type":"object","title":"CssTemplateRestApi.get.User"},"changed_on_delta_humanized":{"readOnly":true},"created_by":{"properties":{"first_name":{"maxLength":64,"type":"string"},"id":{"type":"integer"},"last_name":{"maxLength":64,"type":"string"}},"required":["first_name","last_name"],"type":"object","title":"CssTemplateRestApi.get.User1"},"css":{"nullable":true,"type":"string"},"id":{"type":"integer"},"template_name":{"maxLength":250,"nullable":true,"type":"string"}},"type":"object","title":"CssTemplateRestApi.get"},"show_columns":{"description":"A list of columns","items":{"type":"string"},"type":"array"},"show_title":{"description":"A title to render. Will be translated by babel","example":"Show Item Details","type":"string"}},"type":"object"},"example":{"description_columns":{"column_name":"A Nice description for the column"},"id":"string","label_columns":{"column_name":"A Nice label for the column"},"result":{"changed_on_delta_humanized":{},"css":"string","id":1,"template_name":"string"},"show_columns":["string"],"show_title":"Show Item Details"}}},"description":"Item from Model"},"400":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Bad request: Invalid parameters provided"}}},"description":"Bad request"},"401":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Unauthorized: Authentication required"}}},"description":"Unauthorized"},"404":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Not found: The requested resource does not exist"}}},"description":"Not found"},"422":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Unprocessable entity: Validation error"}}},"description":"Could not process entity"},"500":{"content":{"application/json":{"schema":{"properties":{"message":{"type":"string"}},"type":"object"},"example":{"message":"Internal server error: An unexpected error occurred"}}},"description":"Fatal error"}}}