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/versioned_docs/version-6.1.0/databases/supported/databend.mdx

@@ -0,0 +1,31 @@
+---
+title: Databend
+sidebar_label: Databend
+description: "Databend is a modern cloud-native data warehouse with instant elasticity and pay-as-you-go pricing. Built in Rust for high performance."
+hide_title: true
+---
+
+{/*
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements.  See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership.  The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License.  You may obtain a copy of the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied.  See the License for the
+specific language governing permissions and limitations
+under the License.
+*/}
+
+import { DatabasePage } from '@site/src/components/databases';
+
+export const databaseInfo = {"engine":"databend","engine_name":"Databend","module":"databend","documentation":{"description":"Databend is a modern cloud-native data warehouse with instant elasticity and pay-as-you-go pricing. Built in Rust for high performance.","logo":"databend.png","homepage_url":"https://www.databend.com/","categories":["CLOUD_DATA_WAREHOUSES","ANALYTICAL_DATABASES","PROPRIETARY"],"pypi_packages":["databend-sqlalchemy"],"connection_string":"databend://{username}:{password}@{host}:{port}/{database}?secure=true","default_port":443,"parameters":{"username":"Database username","password":"Database password","host":"Databend host","port":"Databend port (default 443 for HTTPS)","database":"Database name"}},"time_grains":{"SECOND":true,"FIVE_SECONDS":false,"THIRTY_SECONDS":false,"MINUTE":true,"FIVE_MINUTES":true,"TEN_MINUTES":true,"FIFTEEN_MINUTES":true,"THIRTY_MINUTES":false,"HALF_HOUR":false,"HOUR":true,"SIX_HOURS":false,"DAY":true,"WEEK":true,"WEEK_STARTING_SUNDAY":false,"WEEK_STARTING_MONDAY":false,"WEEK_ENDING_SATURDAY":false,"WEEK_ENDING_SUNDAY":false,"MONTH":true,"QUARTER":true,"QUARTER_YEAR":false,"YEAR":true},"score":51,"max_score":201,"joins":true,"subqueries":true,"supports_dynamic_schema":false,"supports_catalog":false,"supports_dynamic_catalog":false,"ssh_tunneling":true,"supports_file_upload":false,"query_cancelation":false,"query_cost_estimation":false,"sql_validation":false,"user_impersonation":false};
+
+<DatabasePage name="Databend" database={databaseInfo} />