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>

Makefile

@@ -45,15 +45,15 @@ help:
 	@echo "  prepare-version - Prepare a version defined in setup.py."
 
 # Target to create a version.txt
+# Uses pure python write to version.txt to circumvent Windows specific echo handling (which fails).
+.PHONY: version-txt
 version-txt:
-	# Get the version from the package for setuptools (and pip)
-	VERSION=$$(${PYTHON} scripts/get_version.py)
-	@echo "$(VERSION)" > version.txt
+	@$(PYTHON) -c "from pathlib import Path; Path('version.txt').write_text('$(VERSION)', encoding='utf-8')"
 	@echo "version.txt set to '$(VERSION)'."
 
 # Target to install EOS in editable form (development mode) into virtual environment.
+# Upgrades installation and dependencies
 install: version-txt
-	# Upgrade installation and dependencies
 	$(UV) sync --extra dev
 	@echo "EOS version $(VERSION) installed in editable form (development mode)."