Release v2.2.1

[2.2.1] - 2026-06-22

Fixed

• SSE connection handler no longer accumulates orphaned connections in memory after unexpected disconnects, preventing server memory use from growing unboundedly over time.
• Cache & Blocked tab domain search now validates input against RFC 1035 label constraints (max 253 octets, labels ≤63 octets, no leading/trailing/consecutive dots, no leading/trailing hyphens, at least one dot required) and performs checks on the raw input before normalization strips dot characters, ensuring malformed domains are rejected rather than silently sanitised.