* perf(analytics): use rfind and local json.loads for hot paths
Replace Path().suffix with string rfind for extension extraction,
use local json.loads binding and bytes split for JSONL parsing.
* fix: use splitlines and preserve extensionless file behavior
split("\n") mishandles \r\n line endings. The early return on
extensionless files changed behavior vs the original Path().suffix
which returned "" and fell through. Use splitlines() and let
extensionless files fall through with lang=None.
* style: use ternary for extensionless file check per SIM108
* Add blackbox benchmark VM infra
D2s_v5 (non-burstable, 2 vCPU, 8 GB) with cloud-init provisioning,
CPU-pinned benchmarks, and A/B comparison scripts.
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Co-authored-by: codeflash[bot] <codeflash[bot]@users.noreply.github.com>
