perf: complete history bootstrap in one streaming phase

modelhub_submmit_api/README.md

@@ -103,12 +103,13 @@ bash run_poll.sh --dry-run
   rule immediately launches a lightweight architecture-only queue scan. Exact
   matching waiting tasks are stopped after two state checks; running tasks and
   tasks without local framework/task metadata are protected.
-- Startup imports a small community/owned seed for immediate decisions. After
-  each submission pass, a durable cursor incrementally scans complete terminal
-  history across all configured accounts. Each bounded page is classified and
-  folded into aggregate decision state immediately; raw task rows and failure
-  logs are never synchronized. Restarts resume the cursor, and the temporary
-  deduplication IDs are removed when the exhaustive backfill completes.
+- Cold start performs no blocking history seed. After the first submission pass,
+  a durable cursor completes the full history scan as one streaming phase using
+  about 1,000 task rows per metadata batch and 200 logs per classification batch.
+  Aggregate checkpoints are synchronized about every 2,000 rows; raw task rows
+  and failure logs are never synchronized. Restarts resume the cursor, temporary
+  deduplication IDs disappear at completion, and later cycles process only new
+  outcome changes.
 - A strategy generation lasts exactly 200 platform-accepted submissions. Rejected API calls and
   duplicates do not advance it. The next cycle refreshes platform history before submitting again.
 - Strategy state is stored in `.modelhub_state/gpu_strategy.json`; a generation never recalculates