Merge branch '3.1'

Optimized the type of `Content-Type` to `string` from `int` for `Hype…

…rf\Tracer\Adapter\Reporter\HttpClientFactory`. (#7791)

refactor: remove deprecated code (#7778)

Merge branch 'master' into 3.2-merge

Optimized `Hyperf\Coordinator\Timer::tick()` to run the callback insi…

…de `Hyperf\Coroutine\wait()` so it executes in a properly managed coroutine context. (#7761)

Release v3.2.0 (#7756)

Use empty string as `escape` for function `str_getcsv`. (#7372)

Modernize array utilities and JSON validation using PHP 8.4+ function…

…s with polyfills (#7523)

Co-authored-by: 李铭昕 <715557344@qq.com>

Merge branch 'master' into 3.2-merge

# Conflicts:
#	.github/workflows/test.yml
#	src/grpc-client/src/BaseClient.php

Support using model name like `App\\Model\\User` for validatoin rule …

…`exists` and `unique`. (#7459)

Co-authored-by: 李铭昕 <715557344@qq.com>