Function drainPageMirrors

drainPageMirrors(
    sql: PageMirrorSql,
    bucket: MirrorBucket | null | undefined,
    readPage: (path: string) => MirrorablePage | null,
    opts?: {
        hits?: ReadonlyMap<string, number> | null;
        limit?: number;
        site?: string;
    },
): Promise<PageMirrorDrain>
Pushes queued pages to R2.

Reads the HTML out of cfw_page at drain time rather than storing a copy in the queue, so the queue stays small and a page re-rendered between queue and drain mirrors its CURRENT bytes.
Parameters
- sql: PageMirrorSql
- bucket: MirrorBucket | null | undefined
- readPage: (path: string) => MirrorablePage | null
  looks a path up in cfw_page; returns null when the row is gone
- opts: { hits?: ReadonlyMap<string, number> | null; limit?: number; site?: string } = {}
Returns Promise<PageMirrorDrain>
- Defined in src/ops/page-mirror.ts:161