refactor(#2285): repoint all hive-c0re host-path consumers to paths.rs

hive-c0re/src/workers/agent_sockets.rs

@@ -17,8 +17,9 @@ use anyhow::{Context, Result};
 /// gateway container bind-mounts this whole tree (read-only) so it
 /// can `proxy_pass` to any agent. Each agent's container bind-mounts
 /// only its own `<name>/` subdir — agents can only access their own
-/// sockets.
-pub const AGENT_SOCKET_DIR: &str = "/run/hive-agent";
+/// sockets. The literal lives in [`crate::paths`]; re-exported here
+/// under the name this module's consumers have always used.
+pub use crate::paths::AGENT_SOCKET_DIR;
 
 /// Socket filename inside each per-agent subdir. Fixed so the path
 /// derives entirely from `(AGENT_SOCKET_DIR, name)` — no second