chore(i18n): drop user-lifecycle translation keys orphaned by cockpit cleanup

Seven translation keys were orphaned by the recent user-lifecycle
cockpit work (commits 144d841, cc2cf3a, 157eb18) and now have zero
callers in pages/, modules/, or core/:

* "Run lifecycle now" — was the <details>-summary title
* "Run user lifecycle now" — was the <details>-button label
* "This runs the lifecycle policy immediately and may deactivate or
  delete users." — was the <details>-blockquote warning
* "User lifecycle logs" — was the embedded panel's title
* "Purge user lifecycle logs" — was the panel's purge-button label
* "Purge entries older than 365 days?" — was the panel's purge confirm
* "Lifecycle audit entry not found" — was the deleted view($id).php
  flash key

The aside-actions partial uses different, still-active keys
("Run policy now", "Purge logs", "Run user lifecycle now?") so no
visible string lost. Removed from all four i18n files
(core + audit-module, de + en) so translation parity stays balanced
and the architecture-test "i18n parity" check stays green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

i18n/default_en.json

@@ -563,7 +563,6 @@
   "Leave empty to keep the currently stored client secret.": "Leave empty to keep the currently stored client secret.",
   "Leave empty to use the runtime default title.": "Leave empty to use the runtime default title.",
   "Legal": "Legal",
-  "Lifecycle audit entry not found": "Lifecycle audit entry not found",
   "Lifecycle event": "Lifecycle event",
   "Lifecycle event was already restored": "Lifecycle event was already restored",
   "Lifecycle risks (7d)": "Lifecycle risks (7d)",
@@ -854,14 +853,12 @@
   "Profile sync on Microsoft login": "Profile sync on Microsoft login",
   "Provider message ID": "Provider message ID",
   "Purge API audit logs": "Purge API logs",
-  "Purge entries older than 365 days?": "Purge entries older than 365 days?",
   "Purge entries older than 90 days?": "Purge entries older than 90 days?",
   "Purge expired system audit entries?": "Purge expired system audit entries?",
   "Purge import logs": "Purge import logs",
   "Purge run logs older than 90 days?": "Purge run logs older than 90 days?",
   "Purge scheduler logs": "Purge scheduler logs",
   "Purge system audit logs": "Purge system audit logs",
-  "Purge user lifecycle logs": "Purge user lifecycle logs",
   "Queries": "Queries",
   "Queries (%d)": "Queries (%d)",
   "Query metadata (keys)": "Query metadata (keys)",
@@ -953,10 +950,8 @@
   "Rows total": "Rows total",
   "Rules": "Rules",
   "Run history": "Run history",
-  "Run lifecycle now": "Run lifecycle now",
   "Run now": "Run now",
   "Run preview": "Run preview",
-  "Run user lifecycle now": "Run user lifecycle now",
   "Run user lifecycle now?": "Run user lifecycle now?",
   "Run UUID": "Run UUID",
   "Runner lock not acquired": "Runner lock not acquired",
@@ -1220,7 +1215,6 @@
   "These limits define default and maximum lifetimes for newly issued API tokens.": "These limits define default and maximum lifetimes for newly issued API tokens.",
   "This action cannot be undone.": "This action cannot be undone.",
   "This action revokes all active API tokens immediately across all users.": "This action revokes all active API tokens immediately across all users.",
-  "This runs the lifecycle policy immediately and may deactivate or delete users.": "This runs the lifecycle policy immediately and may deactivate or delete users.",
   "This scheduled job is no longer registered and cannot be edited. It has been superseded by a newer version.": "This scheduled job is no longer registered and cannot be edited. It has been superseded by a newer version.",
   "This setting controls the application name shown across the UI.": "This setting controls the application name shown across the UI.",
   "This setting controls the default language for users without a personal preference.": "This setting controls the default language for users without a personal preference.",
@@ -1307,7 +1301,6 @@
   "User lifecycle completed: %d deactivated, %d deleted": "User lifecycle completed: %d deactivated, %d deleted",
   "User lifecycle defines when inactive users are deactivated or deleted.": "User lifecycle defines when inactive users are deactivated or deleted.",
   "User lifecycle failed": "User lifecycle failed",
-  "User lifecycle logs": "User lifecycle logs",
   "User lifecycle policy": "User lifecycle policy",
   "User lifecycle settings": "User lifecycle settings",
   "User not found": "User not found",