fix: add sub2api codex load factor controls

docs/reference/platform-infra.md

@@ -29,7 +29,8 @@
 - `pool.defaultTempUnschedulable` declares Sub2API account-level temporary unschedulable rules. Keep 429/overload/capacity failures in this YAML policy so the scheduler can cool down a failing account and choose another candidate instead of hard-pinning one provider.
 - `profiles.entries` selects local Codex profile files from `~/.codex/` and maps them to Sub2API account names.
 - `profiles.entries[].capacity` optionally overrides `pool.defaultAccountCapacity` for one account. Capacity is a YAML-controlled routing input; concrete current values belong only in `config/platform-infra/sub2api-codex-pool.yaml` and runtime validation output, not in long-term reference prose. Code constants, Secrets, ad-hoc runtime patches, or stale tests must not override YAML source of truth.
-- Do not change account membership, priority, capacity, WebSocket mode, or other routing policy from inference alone. Unless the user explicitly asks for a configuration change, first preserve the current YAML, collect provenance and runtime evidence, and write the finding to the relevant issue or runbook before proposing a change.
+- `profiles.entries[].loadFactor` optionally overrides `pool.defaultAccountLoadFactor` for one account and is rendered to Sub2API `load_factor`. Treat it as routing policy: values belong in YAML and `codex-pool validate` output, not code constants, Secrets, or ad-hoc runtime patches.
+- Do not change account membership, priority, capacity, load factor, WebSocket mode, or other routing policy from inference alone. Unless the user explicitly asks for a configuration change, first preserve the current YAML, collect provenance and runtime evidence, and write the finding to the relevant issue or runbook before proposing a change.
 - `profiles.entries[].tempUnschedulable` may override the pool default for one account. The CLI renders it into Sub2API credentials as `temp_unschedulable_enabled` and `temp_unschedulable_rules`; rules match HTTP status plus response-body keywords and place only that account into a temporary unschedulable cooldown.
 - `profiles.entries[].openaiResponsesWebSocketsV2Mode` is the account-level Responses WebSocket v2 switch for OpenAI-compatible upstreams that require WebSocket transport. Allowed values are `off`, `ctx_pool`, and `passthrough`; omit the field unless that upstream needs it.
 - `profiles.entries[].upstreamUserAgent` is an optional account-level upstream request User-Agent override. Use it only for upstreams that require a Codex CLI compatible User-Agent; keep the value YAML-controlled and newline-free.
@@ -38,9 +39,9 @@
 
 Enable account-level WebSocket v2 only for upstream profiles that have passed a direct Codex WSv2 probe. Treat this as a YAML-declared capability set, not a hard scheduling pin to one profile; `codex-pool validate` must show at least one current `webSocketsV2.schedulableEnabled` account, and runtime smoke remains the availability proof. The same validation reports each managed account's runtime WebSocket v2 mode and whether it matches YAML, so stale `ctx_pool` settings cannot silently keep routing Codex WS sessions to an upstream that closes with `no available account`, WS handshake 5xx, or before `response.completed`.
 
-When Codex startup repeatedly reports WebSocket reconnects or HTTPS fallback, preserve membership, priority, capacity, and other routing policy until runtime logs identify the failing account and transport. If bounded Sub2API logs show repeated `openai.websocket_proxy_failed` or upstream WS handshake 5xx for one account, remove only that account from the WSv2 capability set in YAML, run `codex-pool sync --confirm`, and prove the result with Codex smoke plus `codex-pool validate`.
+When Codex startup repeatedly reports WebSocket reconnects or HTTPS fallback, preserve membership, priority, capacity, load factor, and other routing policy until runtime logs identify the failing account and transport. If bounded Sub2API logs show repeated `openai.websocket_proxy_failed` or upstream WS handshake 5xx for one account, remove only that account from the WSv2 capability set in YAML, run `codex-pool sync --confirm`, and prove the result with Codex smoke plus `codex-pool validate`.
 
-Do not encode current availability assumptions in long-term reference prose. If an account needs a higher concurrency than `pool.defaultAccountCapacity`, make that a deliberate YAML override and verify it with `codex-pool validate`; the reference document should describe the rule, not repeat the current numeric value.
+Do not encode current availability assumptions in long-term reference prose. If an account needs a higher concurrency or load factor than the pool default, make that a deliberate YAML override and verify it with `codex-pool validate`; the reference document should describe the rule, not repeat the current numeric value.
 
 Do not enable Sub2API `pool_mode` for UniDesk-managed Codex accounts. `pool_mode` retries the same selected account path, while UniDesk's desired failover behavior is to mark the failing account temporarily unschedulable and let Sub2API choose another account from the group. `codex-pool validate` reports each managed account's temporary-unschedulable runtime alignment and should be used after `codex-pool sync --confirm`. Generic 502 bodies such as `Bad Gateway` and Codex-facing `Upstream request failed` must stay in the YAML cooldown policy so an intermittently bad account is cooled down instead of repeatedly adding latency at the next compact or Responses request. The Codex pool default error cooldown is severity-tiered: temporary signals can start at ten minutes, gateway/service/overload failures should cool down longer, and credential, permission, quota, or account-state failures should use the longest cooldown. Exact current values belong in YAML and runtime validation output.