fix(books): update date when metadata is auto fetched

Update the `updatedAt` field on the `books` table whenever book metadata is
automatically fetched or bulk updated. Additionally, filter codecov reports
to only include server coverage and ignore test/config files, and update
the README codecov badge to reflect this.

Closes #186

README.md

@@ -7,7 +7,7 @@ A self-hosted library management and reading platform for ebooks, PDFs, audioboo
 [![Stars](https://img.shields.io/github/stars/bookorbit/bookorbit?style=flat)](https://github.com/bookorbit/bookorbit/stargazers)
 [![CI](https://github.com/bookorbit/bookorbit/actions/workflows/ci.yml/badge.svg)](https://github.com/bookorbit/bookorbit/actions/workflows/ci.yml)
 [![Release](https://github.com/bookorbit/bookorbit/actions/workflows/release.yml/badge.svg)](https://github.com/bookorbit/bookorbit/actions/workflows/release.yml)
-[![codecov](https://codecov.io/gh/bookorbit/bookorbit/graph/badge.svg?token=F6TADEFCUV)](https://codecov.io/gh/bookorbit/bookorbit)
+[![Server Coverage](https://codecov.io/gh/bookorbit/bookorbit/graph/badge.svg?token=F6TADEFCUV&flag=server)](https://codecov.io/gh/bookorbit/bookorbit)  
 [![Latest release](https://img.shields.io/github/v/release/bookorbit/bookorbit?label=latest)](https://github.com/bookorbit/bookorbit/releases)
 [![Commits/month](https://img.shields.io/github/commit-activity/m/bookorbit/bookorbit?label=commits%2Fmonth)](https://github.com/bookorbit/bookorbit/commits/main)
 [![License: AGPL v3](https://img.shields.io/badge/License-AGPL_v3-blue.svg)](LICENSE)
@@ -123,12 +123,6 @@ For local development, see [docs/DEVELOPMENT.md](docs/DEVELOPMENT.md). To contri
 
 ---
 
-## Code Coverage Map
-
-![Codecov Grid](https://codecov.io/gh/bookorbit/bookorbit/graphs/tree.svg?token=F6TADEFCUV)
-
----
-
 ## Support
 
 - **Questions and discussion:** [GitHub Discussions](https://github.com/bookorbit/bookorbit/discussions)