ci: add workspace-hack

[ffengyu]

I hereby agree to the terms of the CLA available at: https://docs.databend.com/dev/policies/cla/

Summary

• fixes: Feature: make the feature selection independent of the compiled packages #18351

Tests

• Unit Test
• Logic Test
• Benchmark Test
• No Test - Explain why

Type of change

• Bug Fix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• Documentation Update
• Refactoring
• Performance Improvement
• Other (please describe):

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This change is 

[github-actions]

🤖 Smart Auto-retry Analysis (Retry 1)

Workflow: 16408415602

📊 Summary

• Total Jobs: 21
• Failed Jobs: 1
• Retryable: 0
• Code Issues: 1

❌ NO RETRY NEEDED

All failures appear to be code/test issues requiring manual fixes.

🔍 Job Details

• ❌ linux / check: Not retryable (Code/Test)

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🤖 About

Automated analysis using job annotations to distinguish infrastructure issues (auto-retried) from code/test issues (manual fixes needed).

[Copilot]

Pull Request Overview

This PR integrates a generated “workspace hack” crate (databend-workspace-hack) into the workspace to unify dependency versions across all member crates via Cargo Hakari. Key changes include:

• Adding databend-workspace-hack as a path dependency in every Cargo.toml to ensure consistent versions.
• Introducing the databend-workspace-hack crate stub with a lib.rs, build.rs, a generated Cargo.toml, and merge settings.
• Disabling the unused_crate_dependencies lint in common/building to avoid errors from the additional hack dependency.

Reviewed Changes

Copilot reviewed 115 out of 116 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
Cargo.toml	Added databend-workspace-hack to workspace members.
Many src/.../Cargo.toml files	Added databend-workspace-hack = { version = "0.1", path = ... } under [dependencies].
databend-workspace-hack/src/lib.rs	Created stub library file.
databend-workspace-hack/build.rs	Added empty build script.
databend-workspace-hack/Cargo.toml	Generated Hakari-managed dependency list.
databend-workspace-hack/.gitattributes	Configured merge and line endings.
src/common/building/src/lib.rs	Commented out #![deny(unused_crate_dependencies)].
.config/hakari.toml	Added configuration for Cargo Hakari.

Comments suppressed due to low confidence (2)

databend-workspace-hack/src/lib.rs:1

• Add the standard Apache license header to this file to maintain consistency with the rest of the codebase and clarify that this crate is under the project’s license.

// This is a stub lib.rs.

databend-workspace-hack/build.rs:1

• Include the project’s license header at the top of this build script to match repository conventions and ensure legal clarity.

// A build script is required for cargo to consider build dependencies.

[Copilot]

Instead of commenting out the lint directive, replace it with #![allow(unused_crate_dependencies)] at the crate root. This explicitly documents that the hack crate injection is intentional and avoids leaving commented code.

Suggested change

	// #![deny(unused_crate_dependencies)]
	#![allow(unused_crate_dependencies)]

[forsaken628]

scripts/setup/dev_setup.sh should update