feat: add Model Context Protocol (MCP) SSE endpoint

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

Cargo.toml

@@ -36,6 +36,7 @@ prettytable-rs = "0.10.0"
 pwhash = "1.0.0"
 regex = "1.9.5"
 rmcp = { version = "0.2.0", features = ["server"] }
+futures = "0.3"
 rusqlite = { version = "0.37.0", features = ["bundled", "array", "chrono"] }
 rusqlite_migration = "2.3.0"
 serde = { version = "1.0.219", features = ["derive"] }
@@ -55,6 +56,8 @@ uzers = "0.12.1"
 which = "8.0.0"
 xdg = "2.5.2"
 magic = "0.13.0"
+rmcp = { version = "0.2.0", features = ["server"] }
+futures = "0.3"
 
 [dev-dependencies]
 tempfile = "3.3.0"