[AZ-960] render-map: dispatch --truth loader on extension (CSV+tlog)

load_ground_truth_track now dispatches on truth_path.suffix:
- .csv → load_csv_ground_truth (AZ-894)
- else (.tlog, .bin, no ext) → load_tlog_ground_truth (AZ-697)

Removes the AZ-959 short-circuit in SubprocessReplayRunner.
_maybe_render_map so CSV-path replay jobs ship with the same
map.html artefact as tlog jobs. Both ground-truth DTOs expose
row-aligned (lat_deg, lon_deg) records so the renderer needs no
other changes.

Touches:
- src/gps_denied_onboard/cli/render_map.py: dispatch +
  source-agnostic tooltip + --truth CLI help expanded
- src/gps_denied_onboard/replay_api/app.py: workaround removed,
  truth_path resolution picks whichever input was uploaded

Tests: 44/44 green across test_az700_render_map.py +
test_az701_replay_api.py:
- 17 pre-existing render-map tests pass unchanged (AC-2)
- New test_load_ground_truth_track_dispatches_to_csv_loader (AC-1)
- New test_load_ground_truth_track_csv_propagates_schema_error
  (AC-4: malformed CSV raises ReplayInputAdapterError)
- New test_cli_renders_map_with_csv_truth (AC-1 end-to-end)
- AZ-959 test_post_replay_csv_path_returns_200... extended to
  assert map_html_url is now present (AC-3)

Bookkeeping: AZ-960 spec moved todo/ → done/, dep-table preamble
seventh bump documents the landing + AC coverage, state.md records
batch 6 complete with AZ-961 as next.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/gps_denied_onboard/replay_api/app.py

@@ -262,16 +262,6 @@ class SubprocessReplayRunner:
         output_dir: Path,
         report_path: Path | None,
     ) -> Path | None:
-        # gps-denied-render-map only understands binary tlog truth
-        # today; CSV-truth dispatch is an AZ-700 follow-up. For now,
-        # CSV-path runs ship without a map (report + emissions still
-        # render, see _maybe_render_report).
-        if inputs.tlog_path is None:
-            _LOGGER.info(
-                "skipping map render — CSV-path runs do not yet support "
-                "the gps-denied-render-map CLI (AZ-700 follow-up)"
-            )
-            return None
         if not shutil.which(self._render_binary):
             venv_bin = Path(sys.executable).parent / self._render_binary
             if not venv_bin.exists():
@@ -283,13 +273,18 @@ class SubprocessReplayRunner:
             render_bin = str(venv_bin)
         else:
             render_bin = self._render_binary
+        # gps-denied-render-map dispatches on the --truth file
+        # extension (AZ-960) so we just pass whichever input path
+        # carried this job's ground truth.
+        truth_path = inputs.csv_path if inputs.csv_path is not None else inputs.tlog_path
+        assert truth_path is not None
         map_path = output_dir / "map.html"
         argv = [
             render_bin,
             "--estimated",
             str(emissions_path),
             "--truth",
-            str(inputs.tlog_path),
+            str(truth_path),
             "--output",
             str(map_path),
         ]