chore: release 0.2.5

[eitsupi]

Summary

• bump the dlin and dlin-core workspace version to 0.2.5
• document user-facing features, breaking changes, bug fixes, and performance improvements since 0.2.4
• keep crates.io publishing out of scope while the exact upstream sqllineage Git revision remains in use

Verification

• cargo test --workspace
• cargo test --workspace --locked
• cargo fmt --all --check
• cargo clippy --workspace --all-targets --all-features --locked -- -D warnings
• cargo build --release --locked
• column-lineage artifact validation (manifest_models=27, catalog_models=27, oracle_cases=16)
• git diff --check