deps: pin animus-protocol tag = "v0.1.0" instead of branch = main

Cuts the silent-breaking-change risk where a main commit on
animus-protocol would have rippled into a fresh `cargo build` here.
animus-protocol v0.1.0 is tagged with CI green (d6b63f1).

Author: Shooksie

Cargo.toml

@@ -18,10 +18,10 @@ name = "animus-provider-opencode"
 path = "src/main.rs"
 
 [dependencies]
-animus-plugin-protocol   = { git = "https://github.com/launchapp-dev/animus-protocol", branch = "main" }
-animus-provider-protocol = { git = "https://github.com/launchapp-dev/animus-protocol", branch = "main" }
-animus-plugin-runtime    = { git = "https://github.com/launchapp-dev/animus-protocol", branch = "main" }
-animus-session-backend   = { git = "https://github.com/launchapp-dev/animus-protocol", branch = "main" }
+animus-plugin-protocol   = { git = "https://github.com/launchapp-dev/animus-protocol", tag = "v0.1.0" }
+animus-provider-protocol = { git = "https://github.com/launchapp-dev/animus-protocol", tag = "v0.1.0" }
+animus-plugin-runtime    = { git = "https://github.com/launchapp-dev/animus-protocol", tag = "v0.1.0" }
+animus-session-backend   = { git = "https://github.com/launchapp-dev/animus-protocol", tag = "v0.1.0" }
 
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"