sync: update Wiki from main (b281cdd697f30c2d839b66a6428600c8cbcd26bd)
sync: update Wiki from main (dc6885114e0f1768aaa1e0740edb66980a01dfae)
sync: update Wiki from main (ac28e81114d00ac5823e9c9198448d5b79806195)
sync: update Wiki from main (39a6cb46aa0f04b9be77f5db245539fe44f57a8e)
sync: update Wiki from main (e05277d428a5b489e6e5f9d553e5a25d291b4fe5)
sync: update Wiki from main (5755380cb6d371bde7cfb787f331fe24c5c373b3)
fix: remove UTF-8 BOM and enforce LF line endings for Gollum compatibility
Sync Wiki to v2.2.0.2 — WebRTC policy alignment, version bumps, compat table fixes
v2.1.6 — Phase 2 policy expansion, Phase 3 test infrastructure, all 14 pages updated
docs: update all wiki pages to v2.1 — architecture, features, security, roadmap, changelog, compatibility matrix