feat: Profiles v2 T5 — tray profile switcher (Go + Swift) + active_profile SSE (MCP-3244) #1426

Job	Run time
Verify OpenAPI Artifacts	14s
Build Frontend	30s
Prepare Version	13s
Build Binaries (macos-15, darwin, arm64, 1, mcpproxy-darwin-arm64, tar.gz)	6m 51s
Build Binaries (ubuntu-latest, linux, amd64, 0, mcpproxy-linux-amd64, tar.gz)	4m 3s
Build Binaries (windows-latest, windows, arm64, 1, mcpproxy-windows-arm64.exe, zip)	2m 38s
Build Binaries (windows-latest, windows, amd64, 1, mcpproxy-windows-amd64.exe, zip)	3m 43s
Build Binaries (macos-15, darwin, amd64, 1, mcpproxy-darwin-amd64, tar.gz)	6m 22s
Build Binaries (ubuntu-latest, linux, arm64, 0, mcpproxy-linux-arm64, tar.gz)	4m 30s
	29m 4s

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