fix(cli): port-forward: update workspace last_used_at (#12659)

This PR updates the coder port-forward command to periodically inform coderd that the workspace is being used:

- Adds workspaceusage.Tracker which periodically batch-updates workspace LastUsedAt
- Adds coderd endpoint to signal workspace usage
- Updates coder port-forward to periodically hit this endpoint
- Modifies BatchUpdateWorkspacesLastUsedAt to avoid overwriting with stale data

Co-authored-by: Danny Kopping <danny@coder.com>

coderd/database/dbmem/dbmem.go

@@ -1046,6 +1046,10 @@ func (q *FakeQuerier) BatchUpdateWorkspaceLastUsedAt(_ context.Context, arg data
 		if _, found := m[q.workspaces[i].ID]; !found {
 			continue
 		}
+		// WHERE last_used_at < @last_used_at
+		if !q.workspaces[i].LastUsedAt.Before(arg.LastUsedAt) {
+			continue
+		}
 		q.workspaces[i].LastUsedAt = arg.LastUsedAt
 		n++
 	}

coderd/database/queries.sql.go

@@ -11504,6 +11504,9 @@ SET
 	last_used_at = $1
 WHERE
 	id = ANY($2 :: uuid[])
+AND
+  -- Do not overwrite with older data
+  last_used_at < $1
 `
 
 type BatchUpdateWorkspaceLastUsedAtParams struct {

coderd/database/queries/workspaces.sql

@@ -433,7 +433,10 @@ UPDATE
 SET
 	last_used_at = @last_used_at
 WHERE
-	id = ANY(@ids :: uuid[]);
+	id = ANY(@ids :: uuid[])
+AND
+  -- Do not overwrite with older data
+  last_used_at < @last_used_at;
 
 -- name: GetDeploymentWorkspaceStats :one
 WITH workspaces_with_jobs AS (