Put Town10HD_Opt's stop lines on the lines CARLA paints

Town10HD_Opt's 33 stop lines (30 traffic lights, 3 stop signs) sat 0.4-4.1 m short of the stop lines CARLA paints, measured along the lane. Each now lies on the `StopLine` object the town's OpenDRIVE places across its lane, which is where the paint is.

**Why it matters.** A vehicle that stops at the painted line had already crossed the map's stop line, so anything that judges a stop by the map, such as a red-light check, failed a car that stopped where the road says to. Checked in CARLA: an ego with its bumper 0.4-3.9 m short of the paint was reported as having crossed the line.

**How each line was moved.**
- The `StopLine` outline is evaluated from the OpenDRIVE geometry: the reference line (lines and arcs) at the object's `s`, offset by `t`, with the outline turned by the road's heading plus the object's `hdg`. The OpenDRIVE inertial frame is this map's local frame.
- The lane direction comes from the centreline of the lanelet that carries the stop line's regulatory element, as Lanelet2 reads it.
- Each end of the stop line moves along that direction onto the `StopLine` that crosses the lane.

**The edit.**
- 51 new nodes, one per old end node: an end two neighbouring stop lines shared (15 of them) is still one node, at the mean of where the two lines put it (they agree to within millimetres). `local_x`/`local_y` are as computed; `lat`/`lon` come from the map's own linear relation to them (a least-squares fit over every node, residual under 0.1 mm); `ele` is 0.0 like the rest of the map.
- The 33 `stop_line` ways now reference the new nodes. Their old end nodes are the lane bounds' points and stay where they were.
- Nothing else changes: no ids are renumbered, and the regulatory elements, lanelets and bounds are untouched.

**Checked.**
- Re-measured against the OpenDRIVE, every stop line reads 0.00 m.
- Rendered top-down in CARLA (Town10HD_Opt, UE5), the moved lines lie on the paint, including the ones that were drawn skewed.
- Loaded by autoware_carla_scenario: the 10 runs of a red-light sweep that it had judged as crossing on red end 0.38-4.1 m before the moved line, as the paint shows.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01RVDWXJs3WKZx7KruLfASrT

autoware_maps/Town10HD_Opt/lanelet2_map.osm

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