[core] Log ignored --skip-bootloader at debug level (#20059)

esphome/__main__.py

@@ -829,9 +829,9 @@ def write_cpp_file() -> int:
 
 def compile_program(args: ArgsProtocol, config: ConfigType) -> int:
     if CORE.skip_bootloader and not (CORE.is_esp32 and CORE.using_toolchain_esp_idf):
-        # Info, not a warning: an orchestrator cannot see YAML toolchain
-        # overrides, this is its expected no-op, and a full build is safe.
-        _LOGGER.info(
+        # Debug only: an orchestrator cannot see YAML toolchain overrides,
+        # so this is its expected no-op, and a full build is safe.
+        _LOGGER.debug(
             "--skip-bootloader ignored: only supported on ESP32 with the "
             "esp-idf toolchain"
         )

tests/unit_tests/test_main.py

@@ -5358,7 +5358,7 @@ def _setup_build_info_test(
     return build_info_path, firmware_path
 
 
-def test_compile_program_warns_and_ignores_skip_bootloader_elsewhere(
+def test_compile_program_quietly_ignores_skip_bootloader_elsewhere(
     tmp_path: Path, caplog: pytest.LogCaptureFixture
 ) -> None:
     """A full build is always safe; orchestrators cannot see YAML overrides."""
@@ -5372,11 +5372,13 @@ def test_compile_program_warns_and_ignores_skip_bootloader_elsewhere(
             side_effect=EsphomeError("stop here"),
         ),
         pytest.raises(EsphomeError, match="stop here"),
-        caplog.at_level("INFO"),
+        caplog.at_level("DEBUG"),
     ):
         compile_program(MockArgs(), config)
 
-    assert "--skip-bootloader ignored" in caplog.text
+    assert [
+        r.levelno for r in caplog.records if "--skip-bootloader ignored" in r.message
+    ] == [logging.DEBUG]
     assert CORE.skip_bootloader is False