feat(core): run indexer in worker (#7418)

packages/common/infra/src/sync/doc/old-id.md

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+AFFiNE currently has a lot of data stored using the old ID format. Here, we record the usage of IDs to avoid forgetting.
+
+## Old ID Format
+
+The format is:
+
+- `{workspace-id}:space:{nanoid}` Common
+- `{workspace-id}:space:page:{nanoid}`
+
+> Note: sometimes the `workspace-id` is not same with current workspace id.
+
+## Usage
+
+- Local Storage
+  - indexeddb: Both new and old IDs coexist
+  - sqlite: Both new and old IDs coexist
+  - server-clock: Only new IDs are stored
+  - sync-metadata: Both new and old IDs coexist
+- Server Storage
+  - Only stores new IDs but accepts writes using old IDs
+- Protocols
+  - When the client submits an update, both new and old IDs are used.
+  - When the server broadcasts updates sent by other clients, both new and old IDs are used.
+  - When the server responds to `client-pre-sync` (listing all updated docids), only new IDs are used.