feat: seven-send 0.1.0 — Library + CLI für SMS und TTS-Anrufe via seven.io

Wiederverwendbarer Baustein (eigenes Paket), nutzbar in beliebigen Programmen,
Cron-Jobs und Alerts:

- client.py: synchroner SevenClient.send_sms / send_voice (Voice als SSML,
  XML-escaped); Result mit ok/code/price/error, best-effort Fehlerbehandlung,
  dry_run-Modus
- cli.py: `seven-send sms|voice` mit --dry-run, --json, sauberen Exit-Codes;
  API-Key aus --api-key oder $SEVEN_API_KEY
- src-Layout, pyproject (console_script seven-send), MIT-Lizenz
- 12 Tests (Client + CLI), httpx gemockt

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

tests/test_cli.py

@@ -0,0 +1,53 @@
+import json
+
+import seven_send.cli as cli
+import seven_send.client as cl
+
+
+class FakeResp:
+    status_code = 200
+    text = '{"success":"100"}'
+
+    def json(self):
+        return {"success": "100", "messages": [{"success": True}], "total_price": 0.075}
+
+
+def _patch(monkeypatch, cap):
+    def fake_post(url, data=None, headers=None, timeout=None):
+        cap.append({"url": url, "data": data})
+        return FakeResp()
+
+    monkeypatch.setattr(cl.httpx, "post", fake_post)
+
+
+def test_cli_sms(monkeypatch, capsys):
+    cap = []
+    _patch(monkeypatch, cap)
+    rc = cli.main(["--api-key", "k", "sms", "--to", "+49", "--text", "Hi"])
+    assert rc == 0
+    assert cap[0]["url"].endswith("/sms")
+    assert "OK" in capsys.readouterr().out
+
+
+def test_cli_voice_json(monkeypatch, capsys):
+    cap = []
+    _patch(monkeypatch, cap)
+    rc = cli.main(["--api-key", "k", "--json", "voice", "--to", "+49", "--text", "Hi"])
+    assert rc == 0
+    data = json.loads(capsys.readouterr().out)
+    assert data["ok"] is True and data["channel"] == "voice"
+
+
+def test_cli_dry_run(monkeypatch):
+    def boom(*a, **k):
+        raise AssertionError("kein POST")
+
+    monkeypatch.setattr(cl.httpx, "post", boom)
+    assert cli.main(["--dry-run", "sms", "--to", "+49", "--text", "Hi"]) == 0
+
+
+def test_cli_missing_key(monkeypatch, capsys):
+    monkeypatch.delenv("SEVEN_API_KEY", raising=False)
+    rc = cli.main(["sms", "--to", "+49", "--text", "Hi"])
+    assert rc == 2
+    assert "Konfig-Fehler" in capsys.readouterr().err