feat(crypto-ffi): Add per-level log methods to Logger callback interface

[morlinbrot]

Closes #1759

The Logger trait previously only supported one catch-all log method which discarded the log level of tracing events. This adds dedicated per-level log methods to the trait.

LoggerWrapper has a new internal level field that tracks the log level, it's instantiated with Level::DEBUG as a default.

NOTE: This is a breaking change to the crate's public bindings API contract. I did not find any special instructions for cases like this but I wanted to note it prominently.

• I've documented the public API changes in the appropriate changelog files (see Writing changelog entries).
• This PR was made with the help of AI.

[codspeed-hq]

Merging this PR will not alter performance

✅ 50 untouched benchmarks

---

_{Comparing morlinbrot:main (050b02d) with main (4fbc1e8)}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.23%. Comparing base (7a2a899) to head (050b02d).
⚠️ Report is 11 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6972      +/-   ##
==========================================
+ Coverage   90.22%   90.23%   +0.01%     
==========================================
  Files         408      408              
  Lines      117273   117273              
  Branches   117273   117273              
==========================================
+ Hits       105814   105826      +12     
+ Misses       7519     7498      -21     
- Partials     3940     3949       +9     

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[morlinbrot]

Pinging @Hywan since you reviewed a previously rejected PR and this implementation closely follows what you laid out in your comments there.

Two notes on decisions I made:

• The above mentioned PR was criticized for removing the log method from Logger but that seems to be a legitimate change to me since its only previous user, LoggerWrapper's Write impl, doesn't use it anymore. And since we're already breaking the trait by splitting into multiple methods, I don't think it makes much sense to keep it for backwards compatibility either. Let me know if I'm overlooking something here.

• The original ticket requests a data: String parameter be added to the logging methods. I deliberately left this out of the PR because the only current user of the logger is tracing_subscriber::fmt() which does not pass a data argument. Making use of one could be supported by a custom tracing_subscriber::Layer implementation but that felt like too big of a scope increase for this PR. Happy to look into this if it's wanted.