feat(conf): add Google-Read-Aloud bot config

[adri]

Add detection for Google's text-to-speech crawler used by Google Assistant and Google Home. Verifies by IP using Google's published user-triggered fetchers list.

Ref: https://developers.google.com/crawling/docs/crawlers-fetchers/overview#google-read-aloud

Summary by Sourcery

New Features:

• Introduce a Google-Read-Aloud bot configuration entry to detect requests from Google's text-to-speech crawler used by Google Assistant and Google Home.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds configuration for detecting the Google-Read-Aloud text-to-speech crawler as a search engine bot, wired into the existing Google parser and using Google’s published IP range list for user-triggered fetchers for verification.

Sequence diagram for Google-Read-Aloud bot detection flow

sequenceDiagram
    participant Client
    participant WebServer
    participant BotDetector
    participant GoogleParser
    participant IpRangeFetcher

    Client->>WebServer: HTTP request with User-Agent Google-Read-Aloud
    WebServer->>BotDetector: Pass request headers and client_ip
    BotDetector->>BotDetector: Match ua against google-read-aloud config
    BotDetector->>GoogleParser: Invoke parse with ua and client_ip
    GoogleParser->>IpRangeFetcher: Fetch IP ranges from user-triggered-fetchers JSON URL
    IpRangeFetcher-->>GoogleParser: Return Google user-triggered IP ranges
    GoogleParser->>GoogleParser: Verify client_ip in Google IP ranges
    GoogleParser-->>BotDetector: Return BotIdentity Google-Read-Aloud
    BotDetector-->>WebServer: Mark request as search_engine bot
    WebServer-->>Client: Serve response with bot-specific handling

Loading

File-Level Changes

Change	Details	Files
Introduce a new bot configuration for the Google-Read-Aloud text-to-speech crawler, integrating it with the existing Google bot parsing and IP verification flow.	Define a new SearchEngine kind entry named google-read-aloud that reuses the existing google parser. Match the crawler by the "Google-Read-Aloud" user agent string. Configure the URLs section to point at Google’s user-triggered fetchers IP ranges JSON for IP-based verification.	bots/conf.d/google-read-aloud.yaml

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 61.80%. Comparing base (60ce193) to head (28e4dc8).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #18       +/-   ##
===========================================
- Coverage   72.76%   61.80%   -10.97%     
===========================================
  Files          15       24        +9     
  Lines         661     1000      +339     
===========================================
+ Hits          481      618      +137     
- Misses        136      324      +188     
- Partials       44       58       +14     

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