Hashavatar API 0.5.0

hashavatar-api v0.5.0

• Updated hashavatar-api and hashavatar to 0.5.0.
• Moved the container image to Wolfi.
• Added Fluxheim-based deployment files and a short deploy guide.
• Added default CodeQL, Dependabot, cargo audit, cargo deny, and release metadata checks.
• Fixed rate limiter memory growth by bounding stored buckets.
• Fixed rate-limit bypass by only trusting forwarded IP headers from configured trusted proxies.
• Fixed internal error responses so infrastructure details are logged server-side but not returned to clients.
• Updated dependencies, including lru to 0.18.0.
• Tagged release as v0.5.0.