All HTTP clients (Telegram, Claude API, OTA) were missing
crt_bundle_attach, causing TLS handshake failures. Add esp-tls
dependency to CMakeLists.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Direct HTTPS long polling against Telegram Bot API (getUpdates),
JSON parsing with cJSON, auto-split at 4096 chars, Markdown
with plain-text fallback.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>