fix(activity): runs keep their true outcome and spend, the page reaches every kept row, a closing dialog leaves the server log alone

Backend
- A run's outcome write sits outside the job's own try: a database blip after a run that
  succeeded no longer records it as failed (the row waits for the next start's sweep).
- An interrupted run keeps what it spent (the sweep sums its quota rows, as finish does).
- The Scheduler's ad-hoc row says running while any backfill runs, not only the newest.
- recent_runs reads each job's last runs off its index instead of ranking the whole table.
- An interval change is stored with its audit row in one transaction, then rescheduled.
- One API instance per database is the stated contract (.env.example, jobruns).
- Turning full history on for a channel already complete records no run.
- Migration 0109 round-trips interrupted and ad-hoc runs; the run words' DB CHECKs are
  test-held to the enums; the account filter is one helper for the four activity reads.
- An audit row says how many of its request's log lines are still kept.

Frontend
- An "All" period reaches every row still kept (runs and admin actions outlive 90 days).
- Back/Forward is followed in place by the server log: a closing dialog no longer turns
  Live off; a pivot still opens a fresh log.
- Runs moved over from the audit log read their one-liner in the reader's language.
- Filter choices or accounts that failed to load say so beside the filters, with a retry.
- An old server-log link keeps its account, text and range; a remembered retired page
  opens its tab.
- A request whose lines are gone says so instead of linking to an empty list.
- The log lines and the history rows share one row frame, and the server log one list
  frame with the other tabs; an empty list is announced; each day's quota is readable.

backend/app/routes/quota.py

@@ -14,6 +14,7 @@ from app import quota
 from app.auth import admin_user, current_user
 from app.db import get_db
 from app.models import QuotaEvent, User
+from app.routes import _account as account
 from app.routes._keyset import utc
 
 router = APIRouter(prefix="/api/quota", tags=["quota"])
@@ -48,7 +49,7 @@ def my_usage(user: User = Depends(current_user), db: Session = Depends(get_db))
 def admin_usage(
     since: datetime | None = None,
     until: datetime | None = None,
-    user: str | None = Query(default=None, pattern=r"^(none|[0-9]{1,10})$"),
+    user: str | None = Query(default=None, pattern=account.PATTERN),
     _: User = Depends(admin_user),
     db: Session = Depends(get_db),
 ) -> dict:
@@ -60,9 +61,7 @@ def admin_usage(
     if until is not None:
         window.append(QuotaEvent.created_at < utc(until))
     if user is not None:
-        window.append(
-            QuotaEvent.user_id.is_(None) if user == "none" else QuotaEvent.user_id == int(user)
-        )
+        window.append(account.condition(QuotaEvent.user_id, user))
 
     totals = db.execute(
         select(QuotaEvent.user_id, func.sum(QuotaEvent.units))