fix: fix DB Manager not working with db resources with 4+ path segments (#7809)

* support more than 3 path segments

* Fix explore db resource not working with 4+ path segments

* don't assume 3 segments

* ?table= syntax impl

* update parsers

* more nit fixes

* fix sql query

* claude nit

* Update SQLx metadata

---------

Co-authored-by: windmill-internal-app[bot] <windmill-internal-app[bot]@users.noreply.github.com>

backend/windmill-api/src/assets.rs

@@ -184,7 +184,13 @@ async fn list_assets(
         FROM asset
         INNER JOIN asset_summary ON asset.path = asset_summary.path AND asset.kind = asset_summary.kind
         LEFT JOIN resource ON asset.kind = 'resource'
-          AND array_to_string((string_to_array(asset.path, '/'))[1:3], '/') = resource.path
+          AND (
+            -- Extract base path before '?' for ?table= syntax
+            CASE
+              WHEN asset.path LIKE '%?%' THEN split_part(asset.path, '?', 1)
+              ELSE asset.path
+            END
+          ) = resource.path
           AND resource.workspace_id = $1
         LEFT JOIN v2_job job ON asset.usage_kind = 'job'
           AND asset.usage_path = job.id::text