WordPress client improvements:
- Add ConnectionError exception for network-level failures
- Differentiate DNS, SSL, timeout, and connection refused errors
- Add retry with exponential backoff for transient errors (502, 503, 504, 429)
- Auth/config errors are never retried
- Add request timeout (30s default)
Health check improvements:
- Detect REST API disabled (403/404 on /wp-json)
- Classify errors by type: dns_failure, ssl_error, timeout, connection_refused
Bare except cleanup:
- Replaced all bare except: with except Exception: across 12 files
Tests: 303 passed (13 new tests for error handling)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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