fix: resolve the seven bugs pinned by the test audit

- read [ignored_tags] instead of [ignored_domains], so tag-based ignoring
  actually works
- match ignored tags as whole tags, not substrings ('ipt' no longer matches
  'iptorrents')
- send the login-error notification through the Pushover client instead of
  the non-existent module-level send_message()
- handle an empty torrent list instead of raising IndexError before any
  summary is sent
- tag a new torrent once instead of once per code path
- honour toml_path without DOCKER in AppriseClient
- close replaced log handlers so the file descriptor is released

Also add the missing [telemetry] section to config.toml.example, which
qbit-maid.py requires at startup.

The tests that pinned each bug now assert the fixed behaviour, and the
suite still reports 100% coverage.

AppriseClient.py

@@ -11,19 +11,16 @@ def apprise_notify(req_obj, host, port, aurls, title, body):
 class AppriseClient:
     def __init__(self):
         self.config = ''
-        try:
-            if os.environ["DOCKER"]:
-                self.host = os.environ["host"]
-                self.port = os.environ["port"]
-                self.aurls = os.environ["aurls"]
-                self.title = os.environ["title"]
-                self.body = os.environ["body"]
-            if os.environ["toml_path"]:
-                config_file_path=os.environ["toml_path"]
-                with open(config_file_path, 'rb') as c:
-                    self.config = load(c)
-        except:
-            KeyError
+        if os.environ.get("DOCKER"):
+            self.host = os.environ["host"]
+            self.port = os.environ["port"]
+            self.aurls = os.environ["aurls"]
+            self.title = os.environ["title"]
+            self.body = os.environ["body"]
+        if os.environ.get("toml_path"):
+            config_file_path=os.environ["toml_path"]
+            with open(config_file_path, 'rb') as c:
+                self.config = load(c)
         if os.path.exists('./config.toml'):
             config_file_path = './config.toml'
             with open(config_file_path, 'rb') as c:
@@ -37,4 +34,4 @@ class AppriseClient:
         self.apprise_response = apprise_notify(r,self.host,self.port,self.aurls,self.title,self.body)  
 
 if __name__ == "__main__":
-    AppriseClient()
+    AppriseClient()