Paladium Bot v100.3.62

Fixes:
- Hardened RICH1 decoder against wrapped/newline Base64 payloads.
- Supports RICH1:, escaped RICH1\:, and control-prefixed \x1eRICH1: envelopes.
- Centralized Rich plain/html decoding so internal envelopes cannot leak to users.
- Uploader rich-content renderer now never exposes RICH1/Base64 as human-facing text.
- Existing folder captions stored as legacy RICH1 are self-healed to plain caption + entity JSON.

Static tests:
- PHP lint: PASS
- Wrapped Base64 RICH1 decode: PASS
- custom_emoji entity preservation: PASS
- bold entity preservation: PASS
- ZIP integrity: PASS

Live Telegram/production test: NOT RUN in this environment.
