Web4PR v0.11.0

• refactor: adopt upstream design patterns for C/R bits and weakref cleanup
• feat: frontend v2.2 protocol version UI
• feat: protocol trace events for v2.2 negotiation, MCP version_policy param
• feat: add protocol trace events for v2.2 negotiation and expose in MCP tools
• feat: add AX.25 v2.2 protocol version UI to frontend
• feat: mode-aware SREJ patches for AX.25 v2.2 selective reject
• feat: wire AX.25 v2.2 version_policy through session layer
• feat: wire AX.25 v2.2 config through session layer
• feat: mode-aware SREJ patches for AX.25 v2.2 selective reject
• refactor: extract aioax25_patches.py and frame_builder.py from ax25_session.py
• feat: add modulo 128 frame decoding to ax25_decoder
• feat: add v2.2 schema — VersionPolicy, RejectMode enums, config fields
• refactor: extract monkey-patches and frame helpers from ax25_session.py
• feat: add AX.25 v2.2 modulo 128 frame decoding support
• feat: add AX.25 v2.2 schema and enums (XID, TEST, VersionPolicy, RejectMode)