Fix builder: install llvm-dev and libclang-dev for clang-sys/bindgen

[alexk-aleo]

Problem

The Build and Push SnarkOS workflow fails during the Docker build step (telemetry / history-telemetry feature sets) with:

error: failed to run custom build command for `clang-sys v1.8.1`
cargo:warning=could not execute `llvm-config` ... "couldn't execute `llvm-config --prefix`
  (path=llvm-config) (error: No such file or directory (os error 2))"
thread 'main' panicked at clang-sys-1.8.1/build/dynamic.rs:225:45
ERROR: process "/bin/sh -c git checkout ... && cargo build --release --features history,telemetry"
  did not complete successfully: exit code: 101

Root cause

The telemetry and history feature sets pull in clang-sys (via bindgen), which needs libclang and llvm-config at build time. The builder stage installed clang lld binutils but not the LLVM dev packages that provide libclang.so and llvm-config, so clang-sys's build script panicked.

Fix

Add llvm-dev (provides llvm-config) and libclang-dev (provides libclang.so) to the builder-stage apt install in all Dockerfiles for consistency:

• Dockerfile
• service/snarkos-telemetry/Dockerfile
• service/snarkos-history-telemetry/Dockerfile
• service/snarkos-no-features/Dockerfile

These packages are only installed in the discarded builder stage, so the runtime image is unaffected.

https://claude.ai/code/session_011UyaFFB58ZnFBdhVNWf23Z

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Generated by Claude Code

[sergii-aleo]

Redundant PR (#18)