refactor(#2581): carve per-agent mcp.sock protocol into hive-agent-sock crate

Cargo.lock

@@ -1523,6 +1523,7 @@ dependencies = [
  "clap",
  "forgejo-api",
  "futures-util",
+ "hive-agent-sock",
  "hive-claude",
  "hive-sh4re",
  "http-body-util",
@@ -1551,6 +1552,7 @@ dependencies = [
  "anyhow",
  "axum",
  "clap",
+ "hive-agent-sock",
  "hive-sh4re",
  "rmcp",
  "serde",
@@ -1560,13 +1562,21 @@ dependencies = [
  "tracing-subscriber",
 ]
 
+[[package]]
+name = "hive-agent-sock"
+version = "0.1.0"
+dependencies = [
+ "hive-sh4re",
+ "serde",
+]
+
 [[package]]
 name = "hive-agent-wake"
 version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
- "hive-sh4re",
+ "hive-agent-sock",
  "serde",
  "serde_json",
  "tokio",
@@ -1579,6 +1589,7 @@ name = "hive-bash-mcp"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "hive-agent-sock",
  "hive-sh4re",
  "libc",
  "rmcp",
@@ -1604,6 +1615,7 @@ dependencies = [
  "clap-markdown",
  "clap_complete",
  "forgejo-api",
+ "hive-agent-sock",
  "hive-host-sock",
  "hive-priv-sock",
  "hive-sh4re",