fix: default server settings prevent env var config (#1234)

Change configuration source priorities to:

- cli
- environment vars
- dotenv settings
- config file settings
- init settings

By this the environment vars supersede any configuration var
provided by the configuration file or by the initialisation
with pydantic.

The test_config.py::test_computed_path was fixed to to not
use the defaul env var overwrite defined by conftest.py.
This seemed to indicate non working env vars, but in fact
was a test setupt fault.

Besides this fix there are other fixes and changes added:

* fix: exclude computed fields when merging settings

  Pydantic may overwrite settings by values given for computed
  fields and use these values instead of re-computing the field.
  Avoid computed fields in merging settings.

* chore: improve Windows compatability of development setup

  Improve scripts to better run also on Windows. When doing path
  checks keep compatibility also to Windows pathes. A lot of
  changes to avoid the famous Windows CRLF handling and keep
  line endings to LF.

* chore: add development hint for Windows

  Windows developers should set core.autocrlf to false.

* chore: update version

Signed-off-by: b0661 <b0661n0e17e@gmail.com>

scripts/update_version.py

@@ -97,7 +97,8 @@ def update_version_in_file(file_path: Path, new_version: str) -> bool:
         new_content = pattern.sub(repl, new_content)
 
     if file_would_be_updated:
-        file_path.write_text(new_content)
+        with file_path.open("w", encoding="utf-8", newline="\n") as file:
+            file.write(new_content)
 
     return file_would_be_updated
 
@@ -114,7 +115,8 @@ def update_version_date_file() -> str:
         print(f"No change to {VERSION_DATE_FILE}")
         return str(VERSION_DATE_FILE)
 
-    VERSION_DATE_FILE.write_text(new_content, encoding="utf-8")
+    with VERSION_DATE_FILE.open("w", encoding="utf-8", newline="\n") as file:
+        file.write(new_content)
     print(f"Updated {VERSION_DATE_FILE} with UTC date {version_date_str}")
     return str(VERSION_DATE_FILE)