fix(symphony): add --verbose flag for claude -p stream-json mode

Claude Code CLI requires --verbose when using --output-format
stream-json with -p (print) mode. Without it, all sessions exit
immediately with code 1.

Co-Authored-By: Terraphim AI <noreply@anthropic.com>

Author: Terraphim CI

crates/terraphim_symphony/src/runner/claude_code.rs

@@ -112,6 +112,7 @@ impl ClaudeCodeSession {
             prompt.to_string(),
             "--output-format".to_string(),
             "stream-json".to_string(),
+            "--verbose".to_string(),
         ];
 
         // Append max-turns from config