Bump chdig to v26.4.3

[azat]

Changelog category (leave one):

• Improvement

Changelog entry (a user-readable short description of the changes that goes into CHANGELOG.md):

chdig to v26.4.3 (perfetto improvements, fixes for sharing via pastila.nl, flamegraph diffs, change settings in realtime)

[clickhouse-gh]

Workflow [PR], commit [f33d7c5]

Summary: ❌

job_name	test_name	status	info	comment
Upgrade check (amd_release)		FAIL
	Error message in clickhouse-server.log (see upgrade_error_messages.txt)	FAIL	cidb

---

AI Review

Summary

This PR updates chdig/Rust vendoring pointers and refreshes the related Cargo.lock dependency set for v26.4.3. The code changes themselves look consistent for a dependency bump, but there is one user-facing metadata issue in the PR description: the changelog entry claims v26.4.3 while linking to the v26.4.1 release page.

PR Metadata

• Changelog category: Improvement is acceptable for this dependency/version bump.
• Changelog entry: present and required for this category, but currently inconsistent (v26.4.3 text links to v26.4.1).
• Replacement text:
  • chdig to [v26.4.3](https://github.com/azat/chdig/releases/tag/v26.4.3) (perfetto improvements, fixes for sharing via pastila.nl, flamegraph diffs, change settings in realtime)

Findings

💡 Nits

• [contrib/chdig:1] PR metadata inconsistency: changelog text says v26.4.3 but URL points to v26.4.1, which can mislead users reading release notes.
  • Suggested fix: update the link target to the v26.4.3 tag.

ClickHouse Rules

Item	Status	Notes
Deletion logging	➖
Serialization versioning	➖
Core-area scrutiny	➖
No test removal	✅
Experimental gate	➖
No magic constants	✅
Backward compatibility	✅
SettingsChangesHistory.cpp	➖
PR metadata quality	⚠️	Changelog entry links to v26.4.1 while claiming v26.4.3
Safe rollout	✅
Compilation time	✅
No large/binary files	✅

Final Verdict

• Status: ⚠️ Request changes
• Minimum required actions:
  • Fix the changelog entry URL to point to the v26.4.3 release tag.

[Algunenano]

We should switch to the ClickHouse org instead of your own for these deps

[azat]

It does not make a lot of difference, since we bundle them anyway.
This is just a fork with new feature for chdig, I don't think it deserves to be in ClickHouse org