Print warning when report generation failed.

So far, a failure during report generation was logged but not printed to
the terminal, so it could easily be missed by the user.

To change this, also print an explicit, red warning to the terminal in
that case.

src/cluster_utils/server/report.py

@@ -22,7 +22,7 @@
 from . import data_analysis, distributions
 from .latex_utils import LatexFile
 from .optimizers import Optimizer
-from .utils import log_and_print, shorten_string
+from .utils import log_and_print, make_red, shorten_string
 
 
 def init_plotting():
@@ -313,7 +313,12 @@ def filename_gen(base_path):
             latex.produce_pdf(output_file)
             log_and_print(logger, f"Report saved at {output_file}")
         except Exception:
-            logging.warning("Could not generate PDF report", exc_info=True)
+            logging.warning("Failed to generate PDF report", exc_info=True)
+            print(
+                make_red(
+                    "Warning: Failed to generate PDF report.  See log for details."
+                )
+            )
 
 
 def distribution_plots(
@@ -494,4 +499,9 @@ def filename_gen(base_path: str | os.PathLike) -> Iterator[str]:
             latex.produce_pdf(output_file)
             logger.info("Saved report to %s", output_file)
         except Exception:
-            logger.warning("Could not generate PDF report", exc_info=True)
+            logger.warning("Failed to generate PDF report", exc_info=True)
+            print(
+                make_red(
+                    "Warning: Failed to generate PDF report.  See log for details."
+                )
+            )