refactor(frozen-api): optimize API boundary protection (#18649)

* refactor(frozen-api): optimize API boundary protection

- Reduce from 35 protected structures to 8 key entry points
- Remove hash protection from child structures, keep FrozenAPI derives
- Preserve transitive verification chain integrity
- Add support for project-specific type aliases in validation
- Clean up unused imports and machete warnings

Entry points preserved: TableSchema, Scalar, SegmentStatistics,
TableSnapshotStatistics, SegmentInfo(v2/v4), CompactSegmentInfo, TableSnapshot

* fix: configure nextest for proc-macro crate compatibility

- Add single-threaded execution for databend-common-frozen-api in nextest
- Use serial-integration test group to avoid linking issues
- Resolve CI test failures with nextest runner

* Revert "fix: configure nextest for proc-macro crate compatibility"

This reverts commit 7613f4f.

* fix: enable rpath for nextest dynamic library linking

- Set rpath = true in test profile to fix nextest SIGABRT errors
- Allows nextest to find libstd and other dynamic libraries at runtime
- Resolves proc-macro crate testing issues in CI

* Revert "fix: enable rpath for nextest dynamic library linking"

This reverts commit 1d970a6.

* fix: add frozen_api UI test golden files and nextest compatibility

- Add .stderr golden files for trybuild error validation
- Update .gitignore to allow frozen_api test golden files
- Enable rpath=true to fix nextest dynamic library linking issues
- Ensures CI tests pass with proper error message validation

Author: BohuTANG

.gitignore

@@ -23,6 +23,8 @@ perf.*
 
 # tests
 *.stderr
+# Exception: frozen_api UI test golden files
+!src/common/frozen_api/tests/ui/errors/*.stderr
 *.stdout
 *.out
 *.err

Cargo.lock

@@ -647,7 +647,7 @@ codegen-units = 16
 lto = false
 debug-assertions = true
 overflow-checks = true
-rpath = false
+rpath = true
 
 [patch.crates-io]
 arrow-udf-runtime = { git = "https://github.com/datafuse-extras/arrow-udf.git", rev = "a442343" }

Cargo.toml

@@ -8,7 +8,7 @@ edition.workspace = true
 
 [lib]
 doctest = false
-test = false
+test = true
 proc-macro = true
 
 [dependencies]
@@ -17,3 +17,9 @@ proc-macro2 = "1.0"
 quote = "1.0"
 sha2 = { workspace = true }
 syn = { version = "2.0", features = ["full"] }
+
+[dev-dependencies]
+trybuild = "1.0"
+
+[package.metadata.cargo-machete]
+ignored = ["hex", "proc-macro2", "quote", "sha2", "syn"]