fix(reverse): avoid stopping Wine during probes

Repeated SIGSTOP-based injection can suspend Wine while its Win16 mutex is held
and eventually strand the timer callback. Make the short process-memory write
sequence the default between 30 ms callbacks, while retaining whole-process
stopping as an explicit single-probe diagnostic option.

Test Plan:
- `ruff check original/tools/trace_original_state.py original/tools/inject_original_state.py` -- passed
- live no-stop ball-state injection -- passed
- subsequent original timer updates remained observable
- `git diff --cached --check` -- passed

original/MECHANICS_PROGRESS.md

@@ -93,8 +93,8 @@ velocities, flipper inputs and states, and claw animation state whenever any of
 them changes. It neither patches `TDKPIN.EXE` nor pauses Wine. The tracing helper
 is Linux-only development infrastructure; it is not part of the Rust replica.
 
-`tools/inject_original_state.py` briefly stops the opted-in process and updates
-all recovered copies of the ball position and velocity atomically. This permits
+`tools/inject_original_state.py` updates all recovered copies of the ball
+position and velocity between the original 30 ms callbacks. This permits
 repeatable probes at individual walls, circles, gates, and mechanism triggers:
 
 ```sh
@@ -106,7 +106,9 @@ process is modified. Run the injector while the ball is waiting in the launcher
 so it can identify the live game object, or supply the previously reported
 `--object-base` to both the injector and tracer during a sequence of active
 probes. `--substeps 1` isolates one collision integration step; omitting it
-retains the original configured detail level.
+retains the original configured detail level. `--stop-process` is available for
+single probes, but repeated whole-process stops can strand Wine while a Win16
+mutex is held and therefore are not the default.
 
 A probe at `(289,94)` captured the original terminal-18 path. The collision
 suspended the ball while frames advanced from 10 through 18 at the configured

original/tools/inject_original_state.py

@@ -56,6 +56,11 @@ def parse_args() -> argparse.Namespace:
         choices=range(1, 6),
         help="temporarily force the original physics substep count",
     )
+    parser.add_argument(
+        "--stop-process",
+        action="store_true",
+        help="stop all Wine threads during writes; unsafe for repeated Win16 mutex probes",
+    )
     return parser.parse_args()
 
 
@@ -91,7 +96,7 @@ def main() -> None:
     args = parse_args()
     verify_original()
     pid = args.pid if args.pid is not None else find_winevdm_pid()
-    resume_afterward = stop_process(pid)
+    resume_afterward = stop_process(pid) if args.stop_process else False
     try:
         with ProcessMemory(pid, writable=True) as memory:
             data_base = locate_data_segment(memory)