chore(docblock): declare server config shape once via @phpstan-type (closes #594)

[s2x]

Description

Closes #594

Changes

• Declare the 11-key server-configuration array shape once as a @phpstan-type ServerConfig alias on CrazyGoat\WorkermanBundle\Worker\ServerWorker.
• Import it into WorkermanBundle with @phpstan-import-type; servers? is now list<ServerConfig>.
• Replace the three duplicated inline shapes on ServerWorker::{__construct,configureHandler,createSslContext} and the nested shape on WorkermanBundle::loadExtension with the alias.
• Mark serve_files, root_dir and static_files as deprecated inside the alias, naming StaticFilesMiddleware and removal in 1.0 (consistent with UPGRADE.md).
• Docblock-only: zero executable lines changed; no runtime behaviour difference.

Changelog

Entry added under [Unreleased] > Changed.

Proof of Work

docs/proof_of_work/0594-server-config-phpstan-type/ — 3 review round(s), 0 open findings.

Code Review

• Passed subagent code review (rounds 1-3)
• Every finding answered