selftests/damon/drgn_dump_damon_status: dump ctx->ops.id

drgn_dump_damon_status.py is a script for dumping DAMON internal status in
json format.  It is being used for seeing if DAMON parameters that are set
using _damon_sysfs.py are actually passed to DAMON in the kernel space. 
It is, however, not dumping full DAMON internal status, and it makes
increasing test coverage difficult.  Add ctx->ops.id dumping for more
tests.

Link: https://lkml.kernel.org/r/20250720171652.92309-11-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: sjp38

tools/testing/selftests/damon/drgn_dump_damon_status.py

@@ -25,6 +25,11 @@ def to_dict(object, attr_name_converter):
         d[attr_name] = converter(getattr(object, attr_name))
     return d
 
+def ops_to_dict(ops):
+    return to_dict(ops, [
+        ['id', int],
+        ])
+
 def intervals_goal_to_dict(goal):
     return to_dict(goal, [
         ['access_bp', int],
@@ -148,6 +153,7 @@ def schemes_to_list(schemes):
 
 def damon_ctx_to_dict(ctx):
     return to_dict(ctx, [
+        ['ops', ops_to_dict],
         ['attrs', attrs_to_dict],
         ['adaptive_targets', targets_to_list],
         ['schemes', schemes_to_list],