Correct SessionData's Codable conformance (#3317)

Added a cache policy for file middleware (#3314)

Fix warning in service fix (#3303)

Prevent stack overflow by using `NIOLock` instead of `NIOLockedValueB…

…ox` during service initialization (#3302)

* Prevent stack overflow by using `NIOLock` instead of `NIOLockedValueBox` during service initialization

At first glance, one could think that using a `NIOLockedValueBox<(@sendable (Application) -> ServiceType)?>` for `makeService` would be sufficient here. However, for some reason, calling `self.storage.makeService.withLockedValue({ $0 })` repeatedly in `Service.service` causes each subsequent call to the function stored inside the locked value to perform one (or several) more "trampoline" function calls, slowing down the execution and eventually leading to a stack overflow. This is why we use a `NIOLock` here instead; it seems to avoid the `{ $0 }` issue above despite still accessing `_makeService` from within a closure (`{ self._makeService }`).

- Replace `NIOLockedValueBox` with `NIOLock` to avoid adding trampoline function calls
- Add detailed comment explaining the rationale behind the locking mechanism change
- Simplify service initialization with direct fatalError instead of optional handling
- Remove redundant nil checks in service getter

* Add tests.

Fix warnings from NIO 2.79.0 (#3285)

* Start migrating to NIOFileSystem and deprecating old APIs

* Fix all the FileSystem deprecations

* Don't run tracing tests on port 8080

* Match existing write behaviour

* Fix warnings in HTTPServer

* Fix more warnings

* Fix warnings in client tests

* Fix test

* Reduce test time

* Remove auth test warnings

* Fix a bunch more warnings in tests

* Fix a bunch more test warnings

* Migrate environment tests

* More test warnings

* Remove final warnings

* Fix subtle little upgrade bug

* Pull in new NIO release

* Fix tracing test

* Apply suggestions from code review

Co-authored-by: Gwynne Raskind <[email protected]>

* PR reviews

* Remove dodgy test

* PR feedback and migrate client tests to Swift Testing

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Co-authored-by: Gwynne Raskind <[email protected]>

Android support (#3282)

Co-authored-by: Tim Condon <[email protected]>

Use singleton NIOThreadPool by default (#3298)

* Use singleton NIOThreadPool by default

* Also catch the unsupported operation error when configuring a thread pool

* Add link to the source of the error we're ignoring

Adds Support for Tracing Header Extraction (#3280)

* feat: Adds callback for custom span attributes

* test: Fixes tracing test async warnings

* feat: Adds header extraction support to tracing

* fix: Split initializer to avoid API breakage

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Co-authored-by: Tim Condon <[email protected]>

do not truncate response when streaming on error (#3283)

do not truncate response on error

Validation API | `Custom` Validator (#3263)

* feat(Validation): added custom validation validator

* style(ValidationTests): fixed indentation

* test(ValidationTests): added additional test cases

Goal is to have higher test coverage for https://app.codecov.io/gh/vapor/vapor/pull/3263/blob/Sources/Vapor/Validation/Validators/Custom.swift

* feat(ValidationTests,Custom): added tests and code changes to use "not" operator

* fix(ValidationTests.swift): reset to changes before custom validator tests were added

* feat(ValidationTests): added custom validation tests back

* docs(ValidationTests): added comments to improve readability, better naming

* fix(ValidationTests): simplified tests to only test custom validator functionality

* fix(ValidationTests): fixed dumb mistakes

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Co-authored-by: Tim Condon <[email protected]>