me-web? 0.5: the shared exit measured, the route from the server, the network's upstreams

- Behind your provider's shared address, me-web? now shows how its exit hands out ports
  (kept, one after another, from one block, or at random), the range it gave this device,
  and how many customers may share the address at most; the estimate sharpens with each
  check on the same address.
- It tests whether two devices behind the same address can reach each other (hairpin), and
  how long an unused connection stays open: the card says "measuring" for about two minutes
  after the check, then the answer.
- With the test from outside, the publisher's server also traces the route back to your
  address: your provider's routers and the networks in between appear on the path, with
  their names.
- The provider card says which networks your provider reaches the internet through.
- On mobile data, the path shows the operator and the type of network (5G, 4G) read from the
  phone; on Android 13 and later the phone asks once for permission to read the network type.
- The speed card adds the round trip to the publisher's server.
- The network data now comes from the publisher's server, refreshed there from open sources:
  iptoasn.com, DB-IP Lite (CC BY 4.0), the University of Oregon Route Views Project (CC BY 4.0)
  and the Android Open Source Project's list of mobile operators (Apache 2.0); the release
  notes list each source's date and checksum.
- Source links in the cards wrap instead of being cut off.
- New strings, drafted in every language.

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

README.md

@@ -19,14 +19,19 @@ under the step it concerns:
 - whether your router answers apps that ask it to open ports (UPnP, NAT-PMP, PCP), and which internet address it has;
 - whether your provider shares your public IPv4 address with other customers (CGNAT) or there is a second router
   in the way;
-- how your router translates addresses for calls and games (easy or hard NAT), with two STUN servers;
+- how your router translates addresses for calls and games (easy or hard NAT), with two STUN servers, and how it
+  hands out ports, whether two devices behind it can reach each other, and how long it keeps an unused connection
+  open; behind a provider's shared address, how many customers may share it;
+- on mobile data, the operator and the type of network (5G, 4G), read from the phone itself;
 - only if you agree: whether the outside world can actually reach this device, over IPv4 and IPv6, with the ports
   opened by your router for ten minutes and closed afterwards, and whether your own public address works from home
   (hairpin);
 - whether this connection can send mail directly: port 25, the reverse name (PTR) and the blocklists, asked through
   your own name server;
 - whether your name server checks signatures (DNSSEC) and answers honestly for names that don't exist;
-- the speed against the publisher's server, and whether this device makes a sensible server;
+- the speed and the round-trip time to the publisher's server, and whether this device makes a sensible server;
+- which networks your provider reaches the internet through, and, with the test from outside, the route from the
+  publisher's server back to your address;
 - how your public address has changed across your earlier checks.
 
 It ends with what that means: a website, reaching home from outside, family photos and files, a game or voice
@@ -56,8 +61,13 @@ The APK is signed with the key whose certificate SHA-256 is
 
 ## Credits
 
-- Provider map: [iptoasn.com](https://iptoasn.com), Public Domain Dedication and License (PDDL 1.0), fetched for
-  every release; the release notes carry its date and SHA-256.
+- Network data, refreshed on the publisher's server and embedded in every release (the release notes carry each
+  source's date and SHA-256):
+  - provider map: [iptoasn.com](https://iptoasn.com), Public Domain Dedication and License (PDDL 1.0);
+  - network names: IP to ASN Lite by [DB-IP](https://db-ip.com), Creative Commons Attribution 4.0 (CC BY 4.0);
+  - which networks each provider reaches the internet through: the
+    [University of Oregon Route Views Project](https://www.routeviews.org), CC BY 4.0;
+  - mobile operators by network code: the Android Open Source Project's carrier list, Apache License 2.0.
 - Provider notes: each operator's own technical sheet (AGCOM 156/23 in Italy) and users' reports on
   [FibraClick](https://forum.fibra.click), each cited in `data/isps/`.
 - Icons: [Lucide](https://lucide.dev), ISC licence.