Initialer Commit: Kundenverwaltung (PHP/Smarty)

Bestehende Codebasis als Ausgangsstand aufgenommen.

- .gitignore: Kundendaten (uploads_*), Smarty-Compile-Cache
  (templates_c), Laufzeit-Temp und Datenbank-Dumps ausgeschlossen;
  Verzeichnisstruktur ueber .gitkeep erhalten
- .gitattributes: Zeilenenden normalisiert (LF im Repo),
  Binaerformate markiert
- db-backup.php: MySQL-Zugangsdaten kommen jetzt wie im Rest der
  Anwendung aus der externen Konfiguration statt hartkodiert aus der
  Datei; Passwort wird ueber eine temporaere Optionsdatei statt per
  Kommandozeile uebergeben, Fehler von mysqldump/gzip werden gemeldet,
  Aufraeumen aelterer Backups berechnet Jahr und Monat konsistent

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

incs/WebAuthn/rootCertificates/mds/yubikey_5_series_with_nfc.pem

@@ -0,0 +1,107 @@
+YubiKey 5 Series with NFC
+-------------------------
+
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
+-----BEGIN CERTIFICATE-----
+MIIDSDCCAjCgAwIBAgIUDqERw+4RnGSggxgUewJFEPDRZ3YwDQYJKoZIhvcNAQEL
+BQAwJDEiMCAGA1UEAwwZWXViaWNvIEF0dGVzdGF0aW9uIFJvb3QgMTAgFw0yNDEy
+MDEwMDAwMDBaGA85OTk5MTIzMTIzNTk1OVowLjEsMCoGA1UEAwwjWXViaWNvIEF0
+dGVzdGF0aW9uIEludGVybWVkaWF0ZSBCIDEwggEiMA0GCSqGSIb3DQEBAQUAA4IB
+DwAwggEKAoIBAQDI7XnH+ZvDwMCQU8M8ZeV5qscublvVYaaRt3Ybaxn9godLx5sw
+H0lXrdgjh5h7FpVgCgYYX7E4bl1vbzULemrMWT8N3WMGUe8QAJbBeioV7W/E+hTZ
+P/0SKJVa3ewKBo6ULeMnfQZDrVORAk8wTLq2v5Llj5vMj7JtOotKa9J7nHS8kLmz
+XXSaj0SwEPh5OAZUTNV4zs1bvoTAQQWrL4/J9QuKt6WCFE5nUNiRQcEbVF8mlqK2
+bx2z6okVltyDVLCxYbpUTELvY1usR3DTGPUoIClOm4crpwnDRLVHvjYePGBB//pE
+yzxA/gcScxjwaH1ZUw9bnSbHyurKqbTa1KvjAgMBAAGjZjBkMB0GA1UdDgQWBBTq
+t0KQngx7ZHrbVHwDunxOn9ihYTAfBgNVHSMEGDAWgBTS7u9aIo06bVwjlz3yhdUm
+8SV7kjASBgNVHRMBAf8ECDAGAQH/AgECMA4GA1UdDwEB/wQEAwIBhjANBgkqhkiG
+9w0BAQsFAAOCAQEAqQaCWMxTGqVVX7Sk7kkJmUueTSYKuU6+KBBSgwIRnlw9K7He
+1IpxZ0hdwpPNikKjmcyFgFPzhImwHJgxxuT90Pw3vYOdcJJNktDg35PXOfzSn15c
+FAx1RO0mPTmIb8dXiEWOpzoXvdwXDM41ZaCDYMT7w4IQtMyvE7xUBZq2bjtAnq/N
+DUA7be4H8H3ipC+/+NKlUrcUh+j48K67WI0u1m6FeQueBA7n06j825rqDqsaLs9T
+b7KAHAw8PmrWaNPG2kjKerxPEfecivlFawp2RWZvxrVtn3TV2SBxyCJCkXsND05d
+CErVHSJIs+BdtTVNY9AwtyPmnyb0v4mSTzvWdw==
+-----END CERTIFICATE-----
+
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----