feat(behandelportal): WP-63 aanvraag status lifecycle enum

Model the full ADR-0002 lifecycle (Ingediend/InBehandeling/
MeerInfoGevraagd/Goedgekeurd/Afgewezen) as a backend enum backing the
existing AanvraagStatusDto.Tag string, and widen the FE union/parse
boundary/switches to match. Ingediend/MeerInfoGevraagd aren't reachable
yet (no behandelaar transition exists) — that's WP-65. Zero DTO shape
change, so gen:api has no drift.

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

src/locale/messages.en.xlf

@@ -1006,12 +1006,28 @@
           <context context-type="linenumber">30</context>
         </context-group>
       </trans-unit>
+      <trans-unit id="aanvraag.status.ingediend" datatype="html">
+        <source>Ingediend</source>
+        <target datatype="html">Submitted</target>
+        <context-group purpose="location">
+          <context context-type="sourcefile">src/app/registratie/domain/aanvraag-view.ts</context>
+          <context context-type="linenumber">32</context>
+        </context-group>
+      </trans-unit>
       <trans-unit id="aanvraag.status.inBehandeling" datatype="html">
         <source>In behandeling</source>
         <target datatype="html">In progress</target>
         <context-group purpose="location">
           <context context-type="sourcefile">src/app/registratie/domain/aanvraag-view.ts</context>
-          <context context-type="linenumber">32</context>
+          <context context-type="linenumber">34</context>
+        </context-group>
+      </trans-unit>
+      <trans-unit id="aanvraag.status.meerInfoGevraagd" datatype="html">
+        <source>Meer informatie gevraagd</source>
+        <target datatype="html">More information requested</target>
+        <context-group purpose="location">
+          <context context-type="sourcefile">src/app/registratie/domain/aanvraag-view.ts</context>
+          <context context-type="linenumber">36</context>
         </context-group>
       </trans-unit>
       <trans-unit id="aanvraag.status.goedgekeurd" datatype="html">
@@ -1094,6 +1110,14 @@
           <context context-type="linenumber">87</context>
         </context-group>
       </trans-unit>
+      <trans-unit id="aanvraag.detail.meerInfoReden" datatype="html">
+        <source>Gevraagde informatie</source>
+        <target datatype="html">Information requested</target>
+        <context-group purpose="location">
+          <context context-type="sourcefile">src/app/registratie/domain/aanvraag-view.ts</context>
+          <context context-type="linenumber">99</context>
+        </context-group>
+      </trans-unit>
       <trans-unit id="aanvraag.detail.reden" datatype="html">
         <source>Reden van afwijzing</source>
         <target datatype="html">Reason for rejection</target>