docs(r2-06): 0.2.0 DataType provisioning delta (upsert/retype) + HISTGW_BOOL_SANDBOX_TAG recipe (06/U-7)

CLAUDE.md

@@ -315,6 +315,11 @@ When the section is disabled the applier binds the no-op `NullHistorianProvision
 run. Every dispatch logs a tally (`dispatched/requested/ensured/skipped/failed`); `dispatched=N` with
 `requested=0` flags the dormant no-op. The API key must carry `historian:tags:write` for `EnsureTags`. (PR
 #423 shipped `GatewayTagProvisioner` but left this wiring out, so provisioning was dormant; restored 2026-06-27.)
+**0.2.0 DataType delta (archreview 06/U-7):** `EnsureTags` is an **upsert** (create-or-update, not
+skip-if-exists), and the 0.2.0 `HistorianTagDefinition.DataType` proto3-optional change means Boolean tags now
+provision as **Int1** (0.1.0 silently defaulted them to Float). A pre-bump Float Boolean is asked to retype
+on its next deploy; the AVEVA-side retype policy is pinned by the live retype probe — see the "0.2.0 DataType
+provisioning delta" section in `docs/Historian.md`.
 
 ### Gateway-side prerequisites
 
@@ -349,6 +354,7 @@ export HISTGW_GATEWAY_ENDPOINT=https://wonder-sql-vd03:5222   # absolute gateway
 export HISTGW_GATEWAY_APIKEY=histgw_<id>_<secret>             # must carry historian:read + historian:write (+ tags:write) scopes
 export HISTGW_TEST_TAG=<existing-tag>                         # read round-trip
 export HISTGW_WRITE_SANDBOX_TAG=<writable-float-tag>          # e.g. HistGW.LiveTest.Sandbox — write round-trip (EnsureTags + write)
+export HISTGW_BOOL_SANDBOX_TAG=<writable-bool-tag>            # e.g. HistGW.LiveTest.BoolSandbox — 0.2.0 Boolean EnsureTags leg + retype probe (06/U-7)
 export HISTGW_ALARM_SOURCE=<source-name>                      # alarm SendEvent → ReadEvents round-trip
 dotnet test --filter "Category=LiveIntegration"
 ```