Refactor _from_server_socket()

[julianz-]

This function in connections.py had become highly nested and complex, triggering linter warnings (C901, WPS505). Decomposed the logic into several smaller private methods:

• _wrap_tls_socket()
• _create_conn()
• _handle_socket_error()
• _setup_conn_addr()

❓ What kind of change does this PR introduce?

• 🐞 bug fix
• 🐣 feature
• 📋 docs update
• 📋 tests/coverage improvement
• 📋 refactoring
• 💥 other

📋 What is the related issue number (starting with #)

Resolves #

❓ What is the current behavior? (You can also link to an open issue here)

❓ What is the new behavior (if this is a feature change)?

📋 Other information:

📋 Contribution checklist:

(If you're a first-timer, check out
this guide on making great pull requests)

• I wrote descriptive pull request text above
• I think the code is well written
• I wrote good commit messages
• I have squashed related commits together after
  the changes have been approved
• Unit tests for the changes exist
• Integration tests for the changes exist (if applicable)
• I used the same coding conventions as the rest of the project
• The new code doesn't generate linter offenses
• Documentation reflects the changes
• The PR relates to only one subject with a clear title
  and description in grammatically correct, complete sentences

[codecov]

Codecov Report

❌ Patch coverage is 64.44444% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.20%. Comparing base (2ffb0ba) to head (4d67561).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #819      +/-   ##
==========================================
- Coverage   78.32%   78.20%   -0.12%     
==========================================
  Files          41       41              
  Lines        4788     4803      +15     
  Branches      547      549       +2     
==========================================
+ Hits         3750     3756       +6     
- Misses        900      907       +7     
- Partials      138      140       +2     

[read-the-docs-community]

Documentation build overview

📚 cheroot | 🛠️ Build #32145455 | 📁 Comparing 4d67561 against latest (2ffb0ba)

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Show files changed (6 files in total): 📝 6 modified | ➕ 0 added | ➖ 0 deleted

File	Status
genindex/index.html	📝 modified
history/index.html	📝 modified
pkg/cheroot/index.html	📝 modified
pkg/cheroot.connections/index.html	📝 modified
pkg/cheroot.server/index.html	📝 modified
pkg/cheroot.ssl.pyopenssl/index.html	📝 modified