ci: replace broken default workflows with compile/unit/integration CI

The two scaffold workflows (Python application / Python package) failed on
every PR: they installed deps from a non-existent requirements.txt, ran
flake8/pytest over the vendored yt_dlp fork (new syntax under the 3.8/3.9
matrix), and collected ad-hoc root scripts — notably test_ai.py, which is
an invalid pasted object dump (not Python).

- Remove python-app.yml / python-package.yml and the junk root scripts
  (test.py, test_ai.py, test_time.py)
- Add .github/workflows/ci.yml with three PR-check jobs:
  * compile     — py_compile every first-party .py (no deps)
  * unit        — pytest on pure logic (conanjurer_functions, constants)
  * integration — boot the Flask services and assert the X-Conjurer-Api-Key
                  auth contract (communication_subroutine + conjurer_musician)
- Add tests/ suite, pytest.ini (testpaths=tests) and conftest.py (sys.path)

Fixes surfaced by the compile gate / needed for the integration job:
- conjurer_librarian/search_bot.py + search_bot2.py: f-string reused the
  same quote ({item["exists"]}) -> SyntaxError on Python < 3.12
- conjurer_musician/media_search_functions.py: made import-safe
  (env-overridable paths, lazy DB load / mkdir) so the service can be
  imported and tested off the Pi

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/unit/test_conanjurer_functions.py

@@ -0,0 +1,63 @@
+"""Unit tests for the Conan Exiles bridge helpers (no Discord/RCON needed)."""
+import conanjurer_functions as cf
+
+
+def test_parse_players_basic():
+    out = (
+        "Idx | Char name | Player name | User ID\n"
+        "0 | Conan | SteamGuy | 1\n"
+        "1 | Khasar | OtherGuy | 2\n"
+        "--- | --- | --- | ---"
+    )
+    assert cf.parse_players(out) == {"Conan", "Khasar"}
+
+
+def test_parse_players_empty_inputs():
+    assert cf.parse_players("No players connected.") == set()
+    assert cf.parse_players("") == set()
+
+
+def test_parse_line_login():
+    event = cf.parse_line("SomeGuy joined the server")
+    assert event is not None
+    assert event.kind == "login"
+    assert "SomeGuy" in event.text
+
+
+def test_parse_line_chat():
+    event = cf.parse_line("Chat: Bob: hello there")
+    assert event is not None
+    assert event.kind == "chat"
+    assert "Bob" in event.text and "hello" in event.text
+
+
+def test_parse_line_unrecognised_is_ignored():
+    assert cf.parse_line("random server noise") is None
+
+
+def test_conanconfig_disabled_when_unconfigured():
+    cfg = cf.ConanConfig("", 25575, "", "local", "", "", 22, "", "")
+    assert cfg.rcon_enabled is False
+    assert cfg.log_enabled is False
+
+
+def test_conanconfig_local_log_enabled():
+    cfg = cf.ConanConfig("", 0, "", "local", "/tmp/conan.log", "", 22, "", "")
+    assert cfg.log_enabled is True
+
+
+def test_conanconfig_rcon_enabled_requires_lib(monkeypatch):
+    # Without aiomcrcon installed, rcon stays disabled even when host+pw are set.
+    monkeypatch.setattr(cf, "_Rcon", None)
+    cfg = cf.ConanConfig("1.2.3.4", 25575, "pw", "local", "", "", 22, "", "")
+    assert cfg.rcon_enabled is False
+    # With the lib present, it enables.
+    monkeypatch.setattr(cf, "_Rcon", object)
+    cfg2 = cf.ConanConfig("1.2.3.4", 25575, "pw", "local", "", "", 22, "", "")
+    assert cfg2.rcon_enabled is True
+
+
+def test_conanconfig_sftp_log_requires_asyncssh(monkeypatch):
+    monkeypatch.setattr(cf, "asyncssh", None)
+    cfg = cf.ConanConfig("", 0, "", "sftp", "/log", "sftp.host", 22, "u", "p")
+    assert cfg.log_enabled is False