Update Rust toolchains to nightly-2026-06-15

[hash-worker]

This PR contains the following updates:

Package	Update	Change	Pending
rust	patch	2026-06-08 → 2026-06-15	2026-06-29 (+1)

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Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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• Automerge
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This PR has been generated by Renovate Bot.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
hash	Ready	Preview, Comment	Jul 3, 2026 12:00am
hashdotdesign-tokens	Ready	Preview, Comment	Jul 3, 2026 12:00am
petrinaut	Ready	Preview, Comment	Jul 3, 2026 12:00am

[cursor]

PR Summary

Low Risk
Routine Renovate toolchain pin with no application logic changes; CI may surface new nightly compiler warnings only.

Overview
Bumps the repo Rust toolchain from nightly-2026-06-08 to nightly-2026-06-15 in rust-toolchain.toml.

Documentation badges in error-stack (crate README, macros README, and lib.rs crate docs) are updated to show 1.83.0/nightly-2026-06-15 so they match the pinned channel.

^{Reviewed by Cursor Bugbot for commit b3da11a. Bugbot is set up for automated code reviews on this repo. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 59.79%. Comparing base (b8f5e58) to head (b3da11a).
⚠️ Report is 29 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8941      +/-   ##
==========================================
+ Coverage   59.77%   59.79%   +0.01%     
==========================================
  Files        1348     1348              
  Lines      131787   131952     +165     
  Branches     5941     5942       +1     
==========================================
+ Hits        78772    78895     +123     
- Misses      52107    52150      +43     
+ Partials      908      907       -1     

Flag	Coverage Δ
apps.hash-ai-worker-ts	1.39% <ø> (-0.01%)	⬇️
apps.hash-api	3.26% <ø> (ø)
blockprotocol.type-system	40.84% <ø> (ø)
local.claude-hooks	0.00% <ø> (ø)
local.harpc-client	51.49% <ø> (ø)
local.hash-graph-sdk	9.63% <ø> (ø)
local.hash-isomorphic-utils	0.18% <ø> (-0.01%)	⬇️
rust.antsi	0.00% <ø> (ø)
rust.error-stack	90.87% <ø> (ø)
rust.harpc-codec	84.70% <ø> (ø)
rust.harpc-net	96.21% <ø> (+0.01%)	⬆️
rust.harpc-tower	67.03% <ø> (ø)
rust.harpc-types	0.00% <ø> (ø)
rust.harpc-wire-protocol	92.23% <ø> (ø)
rust.hash-codec	72.76% <ø> (ø)
rust.hash-graph-api	2.53% <ø> (ø)
rust.hash-graph-authorization	62.59% <ø> (+0.18%)	⬆️
rust.hash-graph-postgres-store	29.40% <ø> (+0.33%)	⬆️
rust.hash-graph-store	37.90% <ø> (-0.10%)	⬇️
rust.hash-graph-temporal-versioning	47.95% <ø> (ø)
rust.hash-graph-types	0.00% <ø> (ø)
rust.hash-graph-validation	83.43% <ø> (ø)
rust.hashql-ast	87.23% <ø> (ø)
rust.hashql-compiletest	28.24% <ø> (ø)
rust.hashql-core	79.60% <ø> (ø)
rust.hashql-diagnostics	72.31% <ø> (ø)
rust.hashql-eval	75.23% <ø> (ø)
rust.hashql-hir	89.06% <ø> (ø)
rust.hashql-mir	88.45% <ø> (ø)
rust.hashql-syntax-jexpr	94.04% <ø> (ø)

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[codspeed-hq]

Merging this PR will degrade performance by 27.89%

❌ 1 (👁 1) regressed benchmark
✅ 79 untouched benchmarks

Performance Changes

	Benchmark	BASE	HEAD	Efficiency
👁	pattern_match_constant	150.8 ns	209.2 ns	-27.89%

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_{Comparing deps/rs/rust-toolchains (b3da11a) with main (3c2befa)¹}

Footnotes

1. No successful run was found on main (73c646e) during the generation of this report, so 3c2befa was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩