Upgrade tonic from 0.11 to 0.13 and prost from 0.12 to 0.13

[danghoangnhan]

Summary

The SDK currently depends on tonic = "0.11.0" and prost = "0.12.6". These are outdated — tonic is now at 0.13+ and prost at 0.13+. Projects that use newer versions of tonic (e.g., 0.13.x) cannot depend on this SDK without version conflicts, since tonic 0.11 and 0.13 expose incompatible types.

Proposed Changes

All changes are mechanical (API renames) with no behavioral differences:

• Cargo.toml: Bump tonic 0.11→0.13.1, prost 0.12→0.13, base64 0.21→0.22, tonic-build 0.11→0.13
• build.rs: compile() → compile_protos() (renamed in tonic-build 0.13)
• src/client.rs: Remove tonic::codegen::StdError (removed in tonic 0.13), use Box<dyn std::error::Error + Send + Sync> directly; Endpoint::new(dst) → dst.connect()
• src/{collection,data,error,schema,types,utils}.rs: from_i32() → try_from() (prost 0.13 removed from_i32 on generated enums)
• src/proto/*.rs: Regenerated with tonic-build 0.13
• Feature flags: tls → tls-native-roots + prost (tonic 0.13 restructured TLS features)

Verification

• cargo build passes cleanly
• cargo test unit tests pass
• cargo clippy shows only pre-existing warnings (none introduced by the upgrade)

I'll submit a PR with these changes.