- Reads mpm-logo.png from filesystem at startup, converts to base64 data URI dynamically
- Removes massive hardcoded LOGO_B64 constant (~5KB of source code eliminated)
- Falls back gracefully if logo file is not found (dev environments)
- Tries both dist/ and public/ paths for dev vs production compatibility
- Adds acknowledgment rendering: if acknowledged_by is set, shows filled name/date
instead of blank signature lines, with green "Acknowledged" badge on section header
- Blank signature lines still shown when acknowledgment is not provided
