test: audit suite for meaningfulness, reach 100% coverage

The suite had 8 empty `pass` tests, two tests that made live network
calls to a production healthcheck endpoint, and a write_csv test that
only asserted the file existed. CI ran only test_komodo_deploy, so the
main suite never executed at all.

- Split tests by module: test_qlist, test_qprocess, test_qlogging_extra,
  test_apprise, test_qbt; rewrote test_qbitmaid and test_write_csv.
- qbt_fakes.py: shared fakes (FakeQbt, FakeQbtClient, FakeAPIError,
  StubPushover, FailingPushover, torrent factory).
- test_qbt.py loads the hyphenated qbit-maid.py via importlib and covers
  the __main__ entry point.
- Replaced the live-network tests with a RecordingRequests stub
  (suite time 14s -> 0.035s).
- .coveragerc + CI unit-tests job running the full suite with
  --fail-under=100.

127 unit tests, 100% statement coverage on all 5 first-party modules
(440 stmts), 15/15 mutations caught.

Seven pre-existing bugs are pinned by tests with KNOWN BUG docstrings
and left unfixed pending a decision.

test_write_csv.py

@@ -1,41 +1,50 @@
-from qprocess import write_csv
-import csv
-import unittest
-import os
-# Torrent Items needed for testing
-# canidate['state'] {canidate["ratio"]} {torrent["tags"]} torrent["seeding_time"] {torrent["category"]} {torrent["name"][0:20]} {canidate["time_active"]}
-class TestWriteCSV(unittest.TestCase):
-    def test_write_csv_dragnet(self):
-        self.cv = csv
-        outfile = './test_dragnet_outfile.csv'
-        state = 'downloading'
-        ratio = 1.05
-        tags = 'ipt'
-        added = 1
-        age = 240000
-        time = 123456
-        thash = 'asfasdf23412adfqwer'
-        tname = 'thisismynamehahahah'
-        trname = 'https://localhost.stackoverflow.tech/317332f1c125bc9c1b9b14fb8e054908/announce'
-        header = ['state','ratio','tags','added','age','time','thash','tname','trname']
-        row = [state,ratio,tags,added,age,time,thash,tname,trname]
-        write_csv(self.cv,outfile,header,row)
-        self.assertTrue(os.path.exists(outfile))
-
-    def test_write_csv_telemetry(self):
-        self.cv = csv
-        outfile = './test_telemetry_outfile.csv'
-        state = 'downloading'
-        ratio = 1.05
-        tags = 'ipt'
-        added = 1
-        thash = 'asfasdf23412adfqwer'
-        tname = 'thisismynamehahahah'
-        trname = 'https://localhost.stackoverflow.tech/317332f1c125bc9c1b9b14fb8e054908/announce'
-        header = ['state','ratio','tags','added','hash','name','tracker']
-        row = [state,ratio,tags,added,thash,tname,trname]
-        write_csv(self.cv,outfile,header,row)
-        self.assertTrue(os.path.exists(outfile))
-
-if __name__ == '__main__':
-    unittest.main()
+"""Tests for qprocess.write_csv — header-once, append semantics."""
+import csv
+import os
+import shutil
+import tempfile
+import unittest
+
+from qprocess import write_csv
+
+HEADER = ["state", "ratio", "tags", "added", "hash", "name", "tracker"]
+ROW = ["downloading", 1.05, "ipt", 1, "asfasdf23412adfqwer",
+       "thisismynamehahahah", "https://localhost.stackoverflow.tech/announce"]
+
+
+class TestWriteCSV(unittest.TestCase):
+    def setUp(self):
+        self.tmp = tempfile.mkdtemp()
+        self.addCleanup(shutil.rmtree, self.tmp, ignore_errors=True)
+        self.outfile = os.path.join(self.tmp, "out.csv")
+
+    def read_rows(self):
+        with open(self.outfile, newline="", encoding="UTF8") as fh:
+            return list(csv.reader(fh))
+
+    def test_writes_header_then_row(self):
+        write_csv(csv, self.outfile, HEADER, ROW)
+        rows = self.read_rows()
+        self.assertEqual(rows[0], HEADER)
+        self.assertEqual(len(rows), 2)
+        self.assertEqual(rows[1][4], "asfasdf23412adfqwer")
+
+    def test_header_is_written_only_once(self):
+        write_csv(csv, self.outfile, HEADER, ROW)
+        write_csv(csv, self.outfile, HEADER, ROW)
+        rows = self.read_rows()
+        self.assertEqual(rows.count(HEADER), 1)
+        self.assertEqual(len(rows), 3)
+
+    def test_creates_the_file_when_missing(self):
+        self.assertFalse(os.path.exists(self.outfile))
+        write_csv(csv, self.outfile, HEADER, ROW)
+        self.assertTrue(os.path.exists(self.outfile))
+
+    def test_values_are_round_tripped(self):
+        write_csv(csv, self.outfile, HEADER, ROW)
+        self.assertEqual(self.read_rows()[1], [str(value) for value in ROW])
+
+
+if __name__ == "__main__":
+    unittest.main()