**Which issue(s) this PR fixes**: 
None.

**What this PR does / why we need it**: 
Update GitHub Actions to fix Windows Service tests failures.

    <internal:C:/hostedtoolcache/windows/Ruby/3.2.8/x64/lib/ruby/3.2.0/rubygems/core_extkernel_require.rb>:86:in
    `require': 127: The specified procedure could not be found. 
    - C:/hostedtoolcache/windows/Ruby/3.2.8/x64/lib/ruby/gems/3.2.0/gems/strptime-0.2.5/lib/strptime/strptime.so (LoadError)

* ref: ruby/setup-msys2-gcc#26

Note: It might be better to have it automatically updated by a bot, just
like `master`.

**Docs Changes**:
Not needed.

**Release Note**: 
CI fixes.

Signed-off-by: Daijiro Fukuda <[email protected]>

… ended (#5035) (#5087)

**Which issue(s) this PR fixes**:
* Backport #5035
* Fixes #5034

**What this PR does / why we need it**:
Remove the Code Climate badge as the service has ended. It appears that
it hasn't been used recently, so just removing it would be sufficient
for now.

**Docs Changes**:
Not needed.

**Release Note**:
Not needed.

Signed-off-by: Daijiro Fukuda <[email protected]>

… (#5086)

**Which issue(s) this PR fixes**:
* Backport #5055

Fixes #5054

**What this PR does / why we need it**:
This PR will resolve CI error.

**Docs Changes**:
N/A

**Release Note**:
N/A

---------

Signed-off-by: Shizuo Fujita <[email protected]>
Signed-off-by: Daijiro Fukuda <[email protected]>
Co-authored-by: Shizuo Fujita <[email protected]>

…s at shutdown (#5026) (#5088)

**Which issue(s) this PR fixes**:
* Backport #5026

**What this PR does / why we need it**:
TCP server with `server` helper does not close all connections at
shutdown process.
When receiving data from multiple clients, the server receive the data
continuously because the connection is not closed.

The server will shut down properly by this PR

### Reproduce
1. Launch Fluentd with following config file.
2. Send syslog data from two or more clients using following client
script
3. Terminate Fluentd
4. Relaunch Fluentd, then it shows the `2025-07-16 14:12:26 +0900
[warn]: #0 restoring buffer file: path = xxxxxxxxx` in logs.

* config

```
<source>
  @type syslog
  tag system

  <transport tcp>
  </transport>

  bind 0.0.0.0
  port 5140
</source>

<match **>
  @type file
  path "#{File.expand_path('~/tmp/fluentd/maillog')}"
  <buffer>
    @type file
    path "#{File.expand_path('~/tmp/fluentd/buffer/buffer_syslog_maillog')}"
    flush_at_shutdown true
  </buffer>
</match>
```

* client script

```ruby
require 'bundler/inline'
gemfile do
  source 'https://rubygems.org'
  gem 'remote_syslog_sender'
end

def create_client
  Thread.new do
    sender = RemoteSyslogSender.new('127.0.0.1', 5140, protocol: :tcp)
    loop do
      sender.transmit("message body")
      sleep 0.5
    end
  end
end

clients = []
3.times do
  clients << create_client
end

clients.each(&:join)
```

Example code.
```
@ary = [1,2,3]

# It would like 1, 2, and 3 to be processed.
# However, following code handles 1 and 3.
@ary.each do |i|
  puts i
  @ary.delete(i)
end
```

**Docs Changes**:
Not needed.

**Release Note**:
Same as the title.

Signed-off-by: Shizuo Fujita <[email protected]>
Signed-off-by: Daijiro Fukuda <[email protected]>
Co-authored-by: Shizuo Fujita <[email protected]>

…5085)

**Which issue(s) this PR fixes**:
* Backport #5057

Continued from

* #5054
* #5055 (6cac9f0)

**What this PR does / why we need it**:
Each test should not consider the initialization of `Fluent::Engine`. It
should be the responsibility of `Fluent::Test.setup`.

Note: Set `nil` explicitly to ensure that GC can remove the objects,
though it is very strange that some objects can still exist after
`remove_const` and `GC.start`.

**Docs Changes**:
Not needed.

**Release Note**:
CI improvements.

Signed-off-by: Daijiro Fukuda <[email protected]>

… (#5092)

**Which issue(s) this PR fixes**: 
* Partially backported from #4896

**What this PR does / why we need it**: 
Refactor out_forward compress setting tests.

**Docs Changes**:
Not needed.

**Release Note**: 
CI fixes.

Signed-off-by: Daijiro Fukuda <[email protected]>

**Which issue(s) this PR fixes**:
* Backport #5064

**What this PR does / why we need it**:

`test_config.rb` and `test_plugin_helper.rb` has same class name.


https://github.com/fluent/fluentd/blob/338050012279f401af41c95049d82cb98b2a370b/test/test_config.rb#L8


https://github.com/fluent/fluentd/blob/338050012279f401af41c95049d82cb98b2a370b/test/test_plugin_helper.rb#L5

The test class name should be unique.

**Docs Changes**:
Not needed.

**Release Note**:
CI improvements.

Signed-off-by: Shizuo Fujita <[email protected]>
Signed-off-by: Daijiro Fukuda <[email protected]>
Co-authored-by: Shizuo Fujita <[email protected]>

**Which issue(s) this PR fixes**:
* Backport #5063

**What this PR does / why we need it**:
Very rarely, tests may take a long time to run, but it is difficult to
determine which tests took a long time.

At [test-unit](https://github.com/test-unit/test-unit) v3.6.3,
`--report-slow-tests` option was introduced to show the top 5 slow
tests.


https://github.com/test-unit/test-unit/blob/d641c29d4068d407808c42b15c6dcdf9c2f2b439/doc/text/news.md?plain=1#L137-L140

I think it might be useful.

Related to #5041

**Docs Changes**:
Not needed.

**Release Note**:
CI improvements.

Signed-off-by: Shizuo Fujita <[email protected]>
Signed-off-by: Daijiro Fukuda <[email protected]>
Co-authored-by: Shizuo Fujita <[email protected]>

Signed-off-by: Daijiro Fukuda <[email protected]>