chore: bump workspace 2.2.15 -> 2.2.16

[satyakwok]

Ships PRs #711 (trie prune race augment-walk), #712 (B3b total_minted self-heal), #713 (pay_one_signer sorted delegators), #714 (collect_reachable depth-aware empty check). See CHANGELOG entry for the per-PR narrative and the 2026-05-24 incident root-cause analysis.

Summary

Risk tier

Check ONE:

• 🟢 Low — docs, tools/, tests/, CI configs, dependency patch bumps in dev-only crates, comments
• 🟡 Medium — non-consensus production code (RPC handlers, network plumbing, observability, ops scripts)
• 🟠 High — consensus-critical crates (sentrix-core, sentrix-trie, sentrix-staking, sentrix-bft), block_executor, apply_block_*, state_root path
• 🔴 Critical — Voyager activation, fork-height changes, hard-fork rollouts, anything that flips env vars on mainnet

Required by tier

🟢 Low — minimum bar

• CI green (tests + clippy + audit + gitleaks)

🟡 Medium — adds

• New public function or behavioural change has at least one corresponding #[test] in same PR
• Brief description of how this was tested (manual run, integration test, etc.)

🟠 High — adds

• Regression test that fails on main and passes with this change — paste test name in PR body
• Designed against documented invariant (link the audit/runbook/design doc)
• Fresh-brain review by someone other than the author (per the consensus-change review checklist)
• Single conceptual unit per PR (no bundling — bundling consensus changes burned us on v2.1.12 → 2026-04-25 livelock)

🔴 Critical — adds

• Testnet rehearsal completed with success criteria + log evidence linked here
• Bake window observed: minimum 2h on testnet at the same configuration before mainnet
• Coordinated rollback plan documented in PR body — exact commands operator runs if it fails
• Operator sign-off at activation moment (not just PR approval — separate moment for the actual flip)

Test plan

Rollback plan

Related

Summary by CodeRabbit

• Chores
  • Updated workspace version to 2.2.16

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: ccb3e83e-0580-4752-9d13-51119dba539a

📥 Commits

Reviewing files that changed from the base of the PR and between cfdb43f and 3b1abcc.

⛔ Files ignored due to path filters (1)

• CHANGELOG.md is excluded by !**/CHANGELOG.md

📒 Files selected for processing (1)

• Cargo.toml

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📝 Walkthrough

Walkthrough

This PR increments the workspace package version in Cargo.toml from 2.2.15 to 2.2.16 via the [workspace.package] section. No other configuration, dependencies, or code changes are present.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~1 minute

Possibly related PRs

• sentrix-labs/sentrix#708: Updates the same [workspace.package].version field in Cargo.toml with an identical versioning pattern.
• sentrix-labs/sentrix#612: Bumps workspace package version in the root Cargo.toml using the same version.workspace propagation mechanism.
• sentrix-labs/sentrix#588: Similar manifest-only version bump with no code changes, updating Cargo package/workspace versions.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description mentions shipping multiple PRs and references incident analysis, but fails to complete critical template sections: Summary, Risk tier selection, Required checks, Test plan, and Rollback plan are all empty or unchecked.	Complete the required template sections: add a 1-3 sentence Summary, select a Risk tier, check the appropriate required items, and provide Test plan details.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: bumping the workspace version from 2.2.15 to 2.2.16.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/bump-v2.2.16

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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