ci: run RPC end-to-end check on local cluster

[sshaplygin]

Closes #64.

Summary

• start the local YTsaurus cluster with an RPC proxy on port 8011
• run rpc_e2e in the post-merge Cluster E2E workflow and emit RPC-proxy logs on failure
• document the CI-backed live RPC check and the local setup

Validation

• bash -n tests/cluster-e2e/run_local_cluster.sh
• cargo fmt --check
• cargo test --workspace
• cargo test --doc
• cargo clippy --workspace --all-targets -- -D warnings

The live Docker check was not run locally because a user-owned yt.frontend container is already using the local stack name.

[github-actions]

📊 Criterion benchmarks: main vs PR

🔍 Main ce41f7a8af9a → PR cf477d5c7e7c

📊 25 benchmark(s) compared · ⚠️ 0 regression(s) at ≥20% · ✅ 0 improvement(s) at ≥20%

ℹ️ Time is lower-is-better. Both revisions ran on the same GitHub-hosted VM; ±20% is an advisory marker, not a merge gate.

Benchmark	main	PR	change	signal
read/read_table_rows/1000	554.92 µs	552.95 µs	-0.4%	ℹ️ within runner noise
read/read_table_rows/10000	4.8641 ms	4.8630 ms	+0.0%	ℹ️ within runner noise
read/read_table_rows/100000	50.784 ms	50.335 ms	-0.9%	ℹ️ within runner noise
Skiff codec throughput/decode_dynamic	45.254 ms	43.482 ms	-3.9%	ℹ️ within runner noise
Skiff codec throughput/encode_dynamic	5.1059 ms	5.2617 ms	+3.1%	ℹ️ within runner noise
Skiff codec throughput/validate_and_skip	6.5407 ms	6.4875 ms	-0.8%	ℹ️ within runner noise
Skiff job throughput/skiff_dynamic	48.618 ms	47.560 ms	-2.2%	ℹ️ within runner noise
write/encode_then_write_table/1000	235.87 µs	240.09 µs	+1.8%	ℹ️ within runner noise
write/encode_then_write_table/10000	1.7260 ms	1.7615 ms	+2.1%	ℹ️ within runner noise
write/encode_then_write_table/100000	16.446 ms	17.220 ms	+4.7%	ℹ️ within runner noise
write/write_table_rows/1000	238.22 µs	239.78 µs	+0.7%	ℹ️ within runner noise
write/write_table_rows/10000	1.6268 ms	1.6325 ms	+0.4%	ℹ️ within runner noise
write/write_table_rows/100000	15.390 ms	15.213 ms	-1.2%	ℹ️ within runner noise
YSON job throughput/parse_borrowed	74.168 ms	72.104 ms	-2.8%	ℹ️ within runner noise
YSON job throughput/parse_dynamic	111.88 ms	110.10 ms	-1.6%	ℹ️ within runner noise
YSON job throughput/parse_owned	79.282 ms	79.296 ms	+0.0%	ℹ️ within runner noise
YSON job throughput/pass_through	25.062 ms	25.108 ms	+0.2%	ℹ️ within runner noise
YSON Throughput/Deserialize Binary	7.6270 ms	7.5736 ms	-0.7%	ℹ️ within runner noise
YSON Throughput/Deserialize Text	9.4873 ms	9.4897 ms	+0.0%	ℹ️ within runner noise
YSON Throughput/Serialize Binary	1.0264 ms	1.0371 ms	+1.0%	ℹ️ within runner noise
YSON Throughput/Serialize Text	3.6437 ms	3.6631 ms	+0.5%	ℹ️ within runner noise
YSON vs Skiff dynamic encoding/skiff_dynamic	23.262 ms	23.017 ms	-1.1%	ℹ️ within runner noise
YSON vs Skiff dynamic encoding/yson_dynamic	85.459 ms	87.751 ms	+2.7%	ℹ️ within runner noise
YSON vs Skiff dynamic job API/skiff_dynamic	48.647 ms	48.951 ms	+0.6%	ℹ️ within runner noise
YSON vs Skiff dynamic job API/yson_dynamic	116.65 ms	114.30 ms	-2.0%	ℹ️ within runner noise