feat: log bot command invocations to the event stream

Bot commands were the only user-initiated path that didn't surface in
the dashboard. They now produce ``command_handled`` /
``command_rate_limited`` / ``command_failed`` rows in ``EventLog``
alongside tracker and action events.

Backend
- ``EventLog`` gains nullable ``command_tracker_id`` / ``telegram_bot_id``
  FKs plus deletion-snapshot name columns (idempotent migration).
- New ``_log_command_event`` helper emits one row per invocation at the
  three branches in ``handle_command``. Logging failures are swallowed
  so they cannot block the user-visible reply.
- Telegram ``from`` is captured in poller and webhook, whitelisted to
  identity fields by ``_normalize_issuer`` (drops ``language_code`` and
  any future PII), persisted under ``details.issuer``.
- ``/api/status`` resolves live ``CommandTracker`` / ``TelegramBot``
  names (mirroring the action pattern) and exposes ``tracker_id``,
  ``command_tracker_id``, ``telegram_bot_id`` so the frontend can
  deep-link.

Frontend
- Event rows are now clickable and open a detail modal with full
  provenance (bot → chat → issuer → provider), raw ``details`` JSON,
  and per-entity action buttons.
- Buttons use the existing ``requestHighlight`` + ``goto`` crosslink
  pattern, so clicking lands on the entity's list page with that
  specific card scrolled into view and pulsing.
- Auto-refresh dropdown (Off / 10s / 30s / 1m / 5m) persisted in
  ``localStorage``; ticker pauses while the tab is hidden.
- Event-type filter, dashboard verb labels, and gradients extended for
  the three new ``command_*`` types.
- Filled in pre-existing missing i18n keys (``common.hide`` /
  ``common.show`` / ``commandConfig.noCommandsForProvider``).

Tests
- New ``test_command_event_logging.py`` covers subject formatting,
  issuer normalization, the three event branches, and graceful failure
  when the DB is unreachable. ``pytest packages/server/tests/`` → 96/96.

packages/server/src/notify_bridge_server/database/migrations.py

@@ -90,6 +90,10 @@ async def migrate_schema(engine: AsyncEngine) -> None:
                 ("user_id", "ALTER TABLE event_log ADD COLUMN user_id INTEGER"),
                 ("action_id", "ALTER TABLE event_log ADD COLUMN action_id INTEGER"),
                 ("action_name", "ALTER TABLE event_log ADD COLUMN action_name TEXT DEFAULT ''"),
+                ("command_tracker_id", "ALTER TABLE event_log ADD COLUMN command_tracker_id INTEGER"),
+                ("command_tracker_name", "ALTER TABLE event_log ADD COLUMN command_tracker_name TEXT DEFAULT ''"),
+                ("telegram_bot_id", "ALTER TABLE event_log ADD COLUMN telegram_bot_id INTEGER"),
+                ("bot_name", "ALTER TABLE event_log ADD COLUMN bot_name TEXT DEFAULT ''"),
             ]:
                 if not await _has_column(conn, "event_log", col):
                     await conn.execute(text(sql))
@@ -105,6 +109,8 @@ async def migrate_schema(engine: AsyncEngine) -> None:
                 ("ix_event_log_user_id", "user_id"),
                 ("ix_event_log_action_id", "action_id"),
                 ("ix_event_log_provider_id", "provider_id"),
+                ("ix_event_log_command_tracker_id", "command_tracker_id"),
+                ("ix_event_log_telegram_bot_id", "telegram_bot_id"),
             ]:
                 await conn.execute(
                     text(f"CREATE INDEX IF NOT EXISTS {idx_name} ON event_log ({col})")