me-web? 0.5.3: the cards no longer contradict each other

- From the publisher's own network, the tests aimed at its server stay inside the house, so
  the type of address translation, the ports, the hairpin, how long a connection stays open,
  the speed and the round trip described the home network: a report said "hard NAT" next to
  "ports kept". These cards now say the test can't run there, and those messages are not sent.
- Who holds your public IPv4 address is now decided by the same evidence as the address
  sharing card, so a home router behind a provider's shared address no longer reads "your
  router" on one card and "shared with other customers" on the next.
- When your connection differs from what the provider notes say is usual (a shared address,
  port 25), the provider card adds "On this line" with what was found, right under the note.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

src/MeWeb.App/Strings/pl.json

@@ -135,6 +135,7 @@
   "FactStunFirst": "Pierwszy serwer STUN",
   "FactStunSecond": "Drugi serwer STUN",
   "FactSystem": "System",
+  "FactThisLine": "Na tym łączu",
   "FactUpload": "Wysyłanie",
   "FactUpnp": "UPnP",
   "FactUpstreams": "Połączenie z internetem przez",