birth script + POST /api/users endpoint

- scripts/birth.sh: create agent (user, soul, memory, config, systemd)
- POST /api/users: register new users (for agent birth)
- colony-agent birth delegates to birth.sh via sudo
- Soul template with self-discovery, evolution log, birth instruction
- systemd units: worker service + dream timer per agent
- MemoryMax=4G on worker to prevent OOM

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/colony-agent/src/main.rs

@@ -44,9 +44,31 @@ async fn main() {
             dream::run_dream();
         }
         Commands::Birth { name, instruction } => {
-            eprintln!("colony-agent: birth '{}' with instruction: {}", name, instruction);
-            eprintln!("not yet implemented");
-            std::process::exit(1);
+            // Birth delegates to the shell script for now
+            let script = std::path::Path::new("scripts/birth.sh");
+            let script_path = if script.exists() {
+                script.to_path_buf()
+            } else {
+                // Try relative to the apes repo
+                let home = std::env::var("HOME").unwrap_or_default();
+                std::path::PathBuf::from(format!("{}/apes/scripts/birth.sh", home))
+            };
+
+            if !script_path.exists() {
+                eprintln!("birth script not found at {} or scripts/birth.sh", script_path.display());
+                eprintln!("run from the apes repo root, or set HOME to the agent dir");
+                std::process::exit(1);
+            }
+
+            let status = std::process::Command::new("sudo")
+                .args(["bash", &script_path.to_string_lossy(), &name, &instruction])
+                .status();
+
+            match status {
+                Ok(s) if s.success() => eprintln!("agent {} born!", name),
+                Ok(s) => { eprintln!("birth failed with status: {}", s); std::process::exit(1); }
+                Err(e) => { eprintln!("failed to run birth script: {}", e); std::process::exit(1); }
+            }
         }
         Commands::Status => {
             eprintln!("colony-agent: status not yet implemented");