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* fix(security): harden SVG sanitizer, rate limiting, and analytics defaults - SVG: add control-char stripping in href values to block whitespace/null-byte obfuscated javascript: URIs; block <feImage> with external href (SSRF via SVG filter primitives); expand test suite to 32 inline bypass payloads - Rate limiting: add per-route limits on tool endpoints (60/min) and batch (20/min); fix compose files defaulting RATE_LIMIT_PER_MIN to 0 which mapped to 50,000 in code; simplify rate limit registration to use env.ts default - Analytics: default ANALYTICS_ENABLED to false so self-hosters do not unknowingly send telemetry - Docker: add --max-time 5 and -s flags to compose healthcheck curl commands * fix: remove stale login limit bypass, reduce error log noise, clean up fixtures - Fix getLoginAttemptLimit() ignoring LOGIN_ATTEMPT_LIMIT when global rate limit exceeded 1000/min, which let the global limit override the stricter per-route login brute-force protection - Downgrade rate limit 429 responses from error to warn level in the global error handler to avoid log noise and unnecessary Sentry reports - Log 4xx client errors at warn level instead of error level - Remove 11 orphaned SVG attack fixture files replaced by inline test payloads