fix for relative path to .env

I find I have to override this when running tests locally.

Perhaps there is another way, or a failsafe alternative

src/speckle_automate/fixtures.py

@@ -16,7 +16,7 @@ class TestAutomationEnvironment(BaseSettings):
     """Get known environment variables from local `.env` file"""
 
     model_config = SettingsConfigDict(
-        env_file=".env",
+        env_file="../.env",
         env_file_encoding="utf-8",
         env_prefix="speckle_",
         extra="ignore",

src/specklepy/transports/server/server.py

@@ -86,6 +86,12 @@ class ServerTransport(AbstractTransport):
 
         self.session = requests.Session()
 
+        self.session.headers.update(
+            {
+                "Accept": "text/plain",
+            }
+        )
+
         if self.account is not None:
             self._batch_sender = BatchSender(
                 self.url, self.stream_id, self.account.token, max_batch_size_mb=1
@@ -93,7 +99,6 @@ class ServerTransport(AbstractTransport):
             self.session.headers.update(
                 {
                     "Authorization": f"Bearer {self.account.token}",
-                    "Accept": "text/plain",
                 }
             )