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/runs.py

@@ -19,14 +19,13 @@ from app import scheduler
 from app.auth import admin_user
 from app.db import get_db
 from app.models import Channel, JobRun, LogEvent, User
+from app.routes import _account as account
 from app.routes._keyset import PAGE_MAX, accounts, older_than, page, utc
 from app.runstatus import RunStatus
 from app.utils import iso, like_escape
 
 router = APIRouter(prefix="/api/admin/runs", tags=["admin"])
 
-# `none` selects the runs no account started (the scheduled ones).
-NONE = "none"
 Facet = Literal["job", "status"]
 
 
@@ -68,11 +67,7 @@ class RunFilters:
         if self.status is not None and skip != "status":
             out.append(JobRun.status == self.status)
         if self.actor is not None:
-            out.append(
-                JobRun.actor_id.is_(None)
-                if self.actor == NONE
-                else JobRun.actor_id == int(self.actor)
-            )
+            out.append(account.condition(JobRun.actor_id, self.actor))
         if self.since is not None:
             out.append(JobRun.started_at >= utc(self.since))
         if self.until is not None:
@@ -93,7 +88,7 @@ class RunFilters:
 def run_filters(
     job: str | None = Query(default=None, max_length=40, pattern=r"^[a-z][a-z0-9_]*$"),
     status: RunStatus | None = None,
-    user: str | None = Query(default=None, pattern=r"^(none|[0-9]{1,10})$"),
+    user: str | None = Query(default=None, pattern=account.PATTERN),
     q: str | None = Query(default=None, max_length=200),
     since: datetime | None = None,
     until: datetime | None = None,