ci(mergify): upgrade configuration to current format

[mergify]

Hey there! 👋

We've noticed that your Mergify configuration is using some deprecated fields.

No worries—we've got your back! This automated PR updates your config to align with the newest standards, ensuring everything keeps running smoothly.

Do not procrastinate! You must upgrade your configuration before 2026-07-31, otherwise your configuration will stop working.

What's Changed?

• pull_request_rules → actions → delete_head_branch: The delete_head_branch action is deprecated. Use GitHub's native 'Automatically delete head branches' setting instead: https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-the-automatic-deletion-of-branches (deadline: 2026-07-31)

Why This Matters

Keeping your configuration up-to-date means you'll benefit from the latest features and improvements Mergify has to offer. Plus, it helps prevent any unexpected hiccups down the road.

Got Questions? We've Got Answers! 🙌

Is this update safe to merge?

Absolutely! We've made sure the changes are compatible with your current setup. Your workflows should continue to work just as before—if not better!

Do I need to do anything special after merging?

Nope! Just merge this PR, and you're all set. If you have any custom configurations, it's a good idea to give them a quick look to ensure everything's in order.

What if I run into issues or have concerns?

We're here to help! Feel free to reach out to our support team anytime.

Thanks for being awesome and keeping your configuration up-to-date! If you have any thoughts or need a hand, don't hesitate to let us know.

Happy merging! 🎉

[github-actions]

Gatling

Generated: 2026-04-02T00:43:42.755Z

Simulation: simulations.BasicSmithy4PlaySimulation

Status: Completed (KO/OK summary unavailable from binary simulation.log)

Console summary:

---- Requests -----------------------------------------------------------------------|---Total---|-----OK----|----KO----
---- Global Information -------------------------------------------------------------|---Total---|-----OK----|----KO----
> OK: t < 800 ms                                                                                          2,375 (92.77%)
> OK: 800 ms <= t < 1200 ms                                                                                   0     (0%)
> OK: t >= 1200 ms                                                                                          184  (7.19%)
> KO                                                                                                          1  (0.04%)
Reports generated, please open the following file: file:///home/runner/work/smithy4play/smithy4play/smithy4play-gatling/target/gatling/basicsmithy4playsimulation-20260402004306107/index.html
Global: percentage of successful events is greater than or equal to 99.0 : true (actual : 99.9609375)
[info] Simulation BasicSmithy4PlaySimulation successful.

Metric	Value

Report (artifact path): /home/runner/work/smithy4play/smithy4play/smithy4play-gatling/target/gatling/basicsmithy4playsimulation-20260402004306107/index.html
Artifact: gatling-report (download from this workflow run)

[github-actions]

Benchmarks (JMH)

Generated: 2026-04-02T00:48:02.971Z

Benchmark	Mode	Cnt	Score	Units
BlobBenchmarks.blobSizeCheck	avgt	10	0.659 ±	ns/op
BlobBenchmarks.createBlobLarge	avgt	10	2.354 ±	ns/op
BlobBenchmarks.createBlobMedium	avgt	10	2.350 ±	ns/op
BlobBenchmarks.createBlobSmall	avgt	10	2.357 ±	ns/op
BlobBenchmarks.createEmptyBlob	avgt	10	0.375 ±	ns/op
BlobBenchmarks.lazyBlobAccessSimulation	avgt	10	5045.117 ± 49.880	ns/op
BlobBenchmarks.lazyBlobCreationSimulation	avgt	10	0.651 ±	ns/op
CodecResolutionBenchmarks.checkIsJsonOnlyEndpoint	avgt	10	1.582 ±	ns/op
CodecResolutionBenchmarks.preComputedJsonOnly	avgt	10	0.372 ±	ns/op
CodecResolutionBenchmarks.resolveJsonOnlyNoHeaders	avgt	10	3.765 ±	ns/op
CodecResolutionBenchmarks.resolveJsonOnlyWithJsonAccept	avgt	10	71.444 ±	ns/op
CodecResolutionBenchmarks.resolveMultipleTypesNoHeaders	avgt	10	126.905 ±	ns/op
CodecResolutionBenchmarks.resolveMultipleTypesWithHeaders	avgt	10	148.487 ±	ns/op
PathParsingBenchmarks.parseComplexPathNaive	avgt	10	445.262 ±	ns/op
PathParsingBenchmarks.parseComplexPathOptimized	avgt	10	327.813 ±	ns/op
PathParsingBenchmarks.parseEmptyPath	avgt	10	1.080 ±	ns/op
PathParsingBenchmarks.parseMediumPathNaive	avgt	10	284.119 ±	ns/op
PathParsingBenchmarks.parseMediumPathOptimized	avgt	10	98.790 ±	ns/op
PathParsingBenchmarks.parseRootPath	avgt	10	1.249 ±	ns/op
PathParsingBenchmarks.parseSimplePathNaive	avgt	10	169.942 ±	ns/op
PathParsingBenchmarks.parseSimplePathOptimized	avgt	10	18.402 ±	ns/op