Fix package structure and lazy-import ODT formatter

Add missing __init__.py to formatters/ so setuptools.find_packages
includes the subpackage in wheel/sdist builds (#16).

Move ODTFormatter import from top-level to lazy import inside
get_formatter_by_extension() so missing odfpy no longer crashes module
load before main() runs. Remove dead except ImportError handler in
cli.py save() block; surface a clear 'odfpy is not installed' message
when the formatter factory returns None for .odt (#25).

Closes #16, closes #25

redmine_reporter/cli.py

@@ -107,25 +107,23 @@ def main(argv: Optional[List[str]] = None) -> int:
         )
 
         if not formatter:
-            known_exts = ", ".join([".odt", ".csv", ".md", ".html"])
-            print(
-                f"❌ Неизвестный формат файла: {output_ext!r}. Поддерживаются: {known_exts}",
-                file=sys.stderr,
-            )
-            return 1
-
-        try:
-            formatter.save(rows, args.output)
-            print(f"✅ Report saved to {args.output}")
-        except ImportError as e:
             if output_ext == ".odt":
                 print(
                     "❌ odfpy is not installed. Install with: pip install odfpy",
                     file=sys.stderr,
                 )
             else:
-                print(f"❌ Import error: {e}", file=sys.stderr)
+                known_exts = ", ".join([".odt", ".csv", ".md", ".html"])
+                print(
+                    f"❌ Неизвестный формат файла: {output_ext!r}. "
+                    f"Поддерживаются: {known_exts}",
+                    file=sys.stderr,
+                )
             return 1
+
+        try:
+            formatter.save(rows, args.output)
+            print(f"✅ Report saved to {args.output}")
         except Exception as e:
             fmt = output_ext.lstrip(".").upper()
             print(f"❌ {fmt} export error: {e}", file=sys.stderr)