Initial commit: data-server leaf crate extracted from myc

High-performance, thread-safe loader and cache for binary market data
files (M1/tick). No dependency on the rest of myc; only chrono, regex, zip.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "data-server"
+version = "0.1.0"
+edition = "2024"
+description = "High-performance, thread-safe loader and cache for binary market data files (M1/tick)."
+
+[dependencies]
+chrono = "0.4"
+regex = "1.10"
+zip = "2"
+
+[dev-dependencies]
+tempfile = "3"