fix(state): add missing child.deinit() in runProcessInherit (#165)

Process resources were leaking due to missing deinit() call after
std.process.Child.init(). Added defer child.deinit() to ensure
proper cleanup.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Trinity Agent

src/tri/tri_state.zig

@@ -33,6 +33,7 @@ pub fn runProcessAndCapture(allocator: std.mem.Allocator, argv: []const []const
 /// Run a subprocess, inherit stdio, return exit code
 pub fn runProcessInherit(allocator: std.mem.Allocator, argv: []const []const u8) !u8 {
     var child = std.process.Child.init(argv, allocator);
+    defer child.deinit();
     child.stdout_behavior = .Inherit;
     child.stderr_behavior = .Inherit;
     _ = try child.spawn();