Hashavatar API 0.13.0

hashavatar-api v0.13.0

This release updates the API and demo site for hashavatar 0.13.0.

Changed

• Uses the published hashavatar 0.13.0 crate.
• Adds demo/API support for the new background modes:
  • polka-dot
  • striped
  • checkerboard
  • grid
  • sunrise
  • ocean
  • starry
• Keeps the demo/API on SHA-512 identity hashing and WebP avatar responses.
• Updates README, security docs, OpenAPI-driven options, and smoke tests for the new background set.

Security and Reliability

• Applies origin-side rate limiting to /og.png.
• Raises the in-memory rate limiter capacity to 65,536 buckets.
• Avoids CSP nonce generation on non-HTML routes.
• Stops exposing signed S3 URL/object-key metadata on standard avatar responses; signed metadata is returned only through /v1/avatar/link.
• Adds regression tests and smoke coverage for the new hardening.

Validation

• Local test suite, clippy, smoke tests, dependency policy, RustSec audit, GitHub CI, and CodeQL passed before tagging.