Add safe bank failure diagnostics for T5 and T6

Address #14 with request correlation, bounded parser reasons, startup version reporting, and rate-limited storage and settlement logs. Preserve accounting and API identity contracts, extend portable tests, and update release versions and rollout guidance.

t6/scripts/README.md

@@ -14,7 +14,7 @@ private server token.
 | `tws_t6_telemetry.gsc` | Async queued game reports (game_start/heartbeat/round_change/game_end) | tws-t6-gsc-utils |
 | `tws_t6_join.gsc` | `.join` chat command lets a spectator newcomer enter mid-match once | Common |
 | `tws_t6_leaderboard.gsc` | Private map high-round record and every tied holder on connection | Common, tws-t6-gsc-utils |
-| `tws_t6_bank.gsc` | Persistent shared GUID bank | Common, telemetry, TWS plugin 1.1.0 |
+| `tws_t6_bank.gsc` | Persistent shared GUID bank | Common, telemetry, TWS plugin 1.2.0 |
 
 ## Install
 
@@ -44,9 +44,13 @@ its plugin dependency during linking. The same rule applies to leaderboard.
 
 ## Player bank
 
+Bank `2.0.2` requires plugin `1.2.0+` for startup version reporting and bounded
+parser diagnostics. Install the DLL and restart the full server process before
+loading these scripts. Follow the [diagnostic rollout and live checks](../../README.md#bank-diagnostics--tws-14).
+
 The optional `tws_t6_bank.gsc` adds `.b`, `.d <amount|all>` and
 `.w <amount|all>` and registers them in help. It requires common and telemetry
-`1.0.0` or newer, the TWS t6 plugin `1.1.0`, Electric Cherry's bank API and
+`1.0.0` or newer, the TWS t6 plugin `1.2.0`, Electric Cherry's bank API and
 a private per-server credential. Follow [bank setup and recovery](../../README.md#player-bank-t5-and-t6),
 including a full process restart for the plugin. Bank `2.0.0+` uses only
 `https://ec.thewrightserver.net/api/bank` and ignores `tws_bank_url`.