fix(doctor): honest module count, temp-path audit warning, connection line

Three doctor-page findings from the usertest panel:

- Module tile no longer counts the hub's built-in 'system'
  pseudo-module — a fresh hub shows 0 modules, matching the
  welcome checklist's definition of an install. Counting is a
  top-level function with unit tests.
- When the audit DB lives in an OS-cleanable temp directory
  (/var/folders, /tmp, Windows Temp), the daemon-files panel
  says so instead of presenting the state as healthy. The
  classifier is a top-level function with unit tests.
- The daemon card states who-talks-to-whom-how in one line:
  endpoint, transport security (TLS / unencrypted-local /
  unencrypted), and whether a bearer token is attached (length
  only) — the auditor's baseline the green dot cannot answer.

Also syncs pubspec.yaml (0.70.0 -> 0.72.0) with kStudioVersion,
which had drifted to 0.71.0 while pubspec stayed behind.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_localizations.dart

@@ -3836,6 +3836,48 @@ abstract class AppLocalizations {
   /// **'Working…'**
   String get doctorDaemonControlWorking;
 
+  /// No description provided for @doctorConnLine.
+  ///
+  /// In en, this message translates to:
+  /// **'Connection: {endpoint} · {transport} · {auth}'**
+  String doctorConnLine(String endpoint, String transport, String auth);
+
+  /// No description provided for @doctorConnTls.
+  ///
+  /// In en, this message translates to:
+  /// **'TLS-encrypted'**
+  String get doctorConnTls;
+
+  /// No description provided for @doctorConnPlainLocal.
+  ///
+  /// In en, this message translates to:
+  /// **'unencrypted (stays on this machine)'**
+  String get doctorConnPlainLocal;
+
+  /// No description provided for @doctorConnPlainRemote.
+  ///
+  /// In en, this message translates to:
+  /// **'unencrypted'**
+  String get doctorConnPlainRemote;
+
+  /// No description provided for @doctorConnToken.
+  ///
+  /// In en, this message translates to:
+  /// **'token configured ({count} characters)'**
+  String doctorConnToken(int count);
+
+  /// No description provided for @doctorConnAnonymous.
+  ///
+  /// In en, this message translates to:
+  /// **'no token (anonymous)'**
+  String get doctorConnAnonymous;
+
+  /// No description provided for @doctorDbVolatileWarning.
+  ///
+  /// In en, this message translates to:
+  /// **'The audit database is stored in a temporary folder the operating system may clean up at any time. For real evidence, move the hub\'s data directory to a permanent location.'**
+  String get doctorDbVolatileWarning;
+
   /// No description provided for @doctorPathLog.
   ///
   /// In en, this message translates to: