Add live reload of exclusion lists (and switch to go 1.25)

[CorentinB]

This PR adds the capability to "live reload" the exclusion files.

It is off by default, I would like the opposite but I didn't want to implement a breaking change, we can discuss it if someone thinks it should be on by default.

There is a new setting --exclusion-file-live-reload to enable it, by default it reloads the files every 60 seconds, but this can be changed with --exclusion-file-live-reload-interval which takes a int corresponding to the number of seconds between each reload.

It works with both file on disk, and remotely. It's a very simple implementation, there are ways we could make it more efficient, it will certainly come in a future PR when I have more time to allow to it.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 17.12329% with 121 lines in your changes missing coverage. Please review.
✅ Project coverage is 54.77%. Comparing base (011c133) to head (b865524).
⚠️ Report is 113 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/pkg/config/exclusions.go	1.98%	99 Missing ⚠️
internal/pkg/config/config.go	41.66%	18 Missing and 3 partials ⚠️
internal/pkg/preprocessor/preprocessor.go	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #428      +/-   ##
==========================================
- Coverage   55.58%   54.77%   -0.82%     
==========================================
  Files         119      120       +1     
  Lines        7313     7343      +30     
==========================================
- Hits         4065     4022      -43     
- Misses       2924     2994      +70     
- Partials      324      327       +3     

Flag	Coverage Δ
e2etests	37.29% <15.75%> (-0.20%)	⬇️
unittests	30.85% <6.16%> (-1.09%)	⬇️

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[Copilot]

Pull Request Overview

This PR implements live reloading functionality for exclusion files, allowing the application to automatically reload exclusion patterns without requiring a restart. The feature is disabled by default to avoid breaking changes and can be enabled via command-line flags.

• Adds live reload capability for exclusion files with configurable intervals (default 60 seconds)
• Refactors exclusion regex handling to use atomic operations for thread-safe updates
• Introduces graceful shutdown handling for the live reload goroutine

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
internal/pkg/config/exclusions.go	New file containing exclusion file loading and regex compilation logic
internal/pkg/config/config.go	Refactored to use atomic storage for exclusion regexes and added live reload goroutine
internal/pkg/preprocessor/preprocessor.go	Updated to use new thread-safe getter method for exclusion regexes
internal/pkg/archiver/archiver.go	Added config context cancellation during shutdown
internal/pkg/log/log.go	Minor whitespace cleanup
cmd/get.go	Added command-line flags for live reload configuration