v0.1.0

• Core STAC validation engine with PCRE regex (^(?!eo:)) support via regexp2.
• Lossless float decoding for STAC geographic coordinates.
• Thread-safe, in-memory JSON Schema $ref cache to eliminate cold starts.
• Concurrent batch processing /validate endpoint for ItemCollection payloads.
• High-performance CLI tool for local STAC validation.
• Dockerfile for microservice deployment.