Fix .env override priority and password whitespace stripping

Change load_dotenv() to load_dotenv(override=False) so real environment
variables always take priority over stale .env files. This prevents a
hardcoded or outdated REDMINE_API_KEY in .env from silently overriding
a fresh token exported in the shell (#15).

Add .strip() to get_redmine_password() for consistency with all other
config getters — trailing whitespace in .env no longer causes silent
auth failures (#35).

Closes #15, closes #35

redmine_reporter/config.py

@@ -3,7 +3,7 @@ from typing import Union
 
 from dotenv import load_dotenv
 
-load_dotenv()
+load_dotenv(override=False)
 
 DEFAULT_REDMINE_VERIFY = "/etc/ssl/certs/ca-certificates.crt"
 FALSE_VALUES = {"0", "false", "no", "off"}
@@ -25,7 +25,7 @@ class Config:
 
     @classmethod
     def get_redmine_password(cls) -> str:
-        return os.getenv("REDMINE_PASSWORD", "")
+        return os.getenv("REDMINE_PASSWORD", "").strip()
 
     @classmethod
     def get_redmine_verify(cls) -> Union[bool, str]: