fix(driver-ablegacy-cli): resolve Low code-review findings (Driver.AbLegacy.Cli-002,003,004,005,006,007)

- Driver.AbLegacy.Cli-002: WriteCommand.Value description lists the full
  true/false, 1/0, on/off, yes/no alias set.
- Driver.AbLegacy.Cli-003: SubscribeCommand serialises every WriteLine
  via a per-execution consoleGate lock so the poll-thread OnDataChange
  handler can't interleave with the banner.
- Driver.AbLegacy.Cli-004: dropped 'await using var driver' in favour of
  a plain 'var driver' + explicit await ShutdownAsync in finally; the
  driver is no longer shut down twice.
- Driver.AbLegacy.Cli-005: SubscribeCommand.IntervalMs description
  carries the PollGroupEngine 250ms-floor caveat; docs/Driver.AbLegacy.Cli.md
  spells out the same.
- Driver.AbLegacy.Cli-006: ProbeCommand --type now carries the short
  alias 't' to match the other commands.
- Driver.AbLegacy.Cli-007: BuildOptionsTests cover the probe-disabled,
  device-shape, tag-passthrough, timeout-propagation, and empty-tag-list
  paths.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

code-reviews/Driver.AbLegacy.Cli/findings.md

@@ -7,7 +7,7 @@
 | Review date | 2026-05-22 |
 | Commit reviewed | `76d35d1` |
 | Status | Reviewed |
-| Open findings | 6 |
+| Open findings | 0 |
 
 ## Checklist coverage
 
@@ -68,7 +68,7 @@ type (mirroring the existing `Bit` and unsupported-type branches). Either catch
 | Severity | Low |
 | Category | Correctness & logic bugs |
 | Location | `Commands/WriteCommand.cs:27-29`, `Program.cs:6-9` |
-| Status | Open |
+| Status | Resolved |
 
 **Description:** The `--value` option help text states "booleans accept
 true/false/1/0", but `ParseBool` (`WriteCommand.cs:74-80`) and the error message
@@ -82,7 +82,10 @@ with both the code and the design doc.
 matching the wording used elsewhere (e.g. "booleans accept
 true/false, 1/0, on/off, yes/no").
 
-**Resolution:** _(open)_
+**Resolution:** Resolved 2026-05-23 — updated `WriteCommand.Value` description to
+list the full alias set: "booleans accept true/false, 1/0, on/off, yes/no".
+Regression test `CommandMetadataTests.WriteCommand_value_help_lists_full_boolean_alias_set`
+asserts the description contains every alias group.
 
 ### Driver.AbLegacy.Cli-003
 
@@ -91,7 +94,7 @@ true/false, 1/0, on/off, yes/no").
 | Severity | Low |
 | Category | Concurrency & thread safety |
 | Location | `Commands/SubscribeCommand.cs:47-53` |
-| Status | Open |
+| Status | Resolved |
 
 **Description:** The `OnDataChange` handler calls `console.Output.WriteLine(line)`
 (the synchronous overload) directly from the `PollGroupEngine` poll thread. The
@@ -109,7 +112,10 @@ change events through a `Channel<string>` drained by a single consumer task, or
 guard the `WriteLine` with a lock. At minimum, document that the interleaving is
 accepted because output is human-facing and line-buffered.
 
-**Resolution:** _(open)_
+**Resolution:** Resolved 2026-05-23 — `SubscribeCommand` now serialises every
+console write through a shared `consoleGate` lock: the poll-thread
+`OnDataChange` callback and the command-thread "Subscribed to ..." line both take
+the lock before calling `WriteLine`. Comment in the source documents the intent.
 
 ### Driver.AbLegacy.Cli-004
 
@@ -118,7 +124,7 @@ accepted because output is human-facing and line-buffered.
 | Severity | Low |
 | Category | Error handling & resilience |
 | Location | `Commands/ProbeCommand.cs:37-56`, `Commands/ReadCommand.cs:39-50`, `Commands/WriteCommand.cs:48-59`, `Commands/SubscribeCommand.cs:41-76` |
-| Status | Open |
+| Status | Resolved |
 
 **Description:** Every command does `await using var driver = new AbLegacyDriver(...)`
 *and* an explicit `await driver.ShutdownAsync(...)` in the `finally`. `AbLegacyDriver`
@@ -135,7 +141,12 @@ cleanup on every exit path including exceptions.
 since the commands deliberately pass `CancellationToken.None` to shutdown so teardown
 is not cut short by a cancelled `ct`.
 
-**Resolution:** _(open)_
+**Resolution:** Resolved 2026-05-23 — replaced `await using var driver` with a
+plain `var driver` in all four commands (`ProbeCommand`, `ReadCommand`,
+`WriteCommand`, `SubscribeCommand`), keeping the explicit
+`finally { await driver.ShutdownAsync(CancellationToken.None) }` as the single
+teardown path. Comment in each command documents the intent so readers do not
+have to verify idempotency.
 
 ### Driver.AbLegacy.Cli-005
 
@@ -144,7 +155,7 @@ is not cut short by a cancelled `ct`.
 | Severity | Low |
 | Category | Design-document adherence |
 | Location | `Commands/SubscribeCommand.cs:23-25`, `docs/Driver.AbLegacy.Cli.md:94-96` |
-| Status | Open |
+| Status | Resolved |
 
 **Description:** The subscribe command interval option is `--interval-ms`
 (default 1000). `docs/Driver.AbLegacy.Cli.md` shows the subscribe example as
@@ -160,7 +171,13 @@ but the documented contract drifts between the two CLIs.
 `--interval-ms` description for parity with the AbCip CLI, and mention the
 `--interval-ms` long form + 1000 ms default in `docs/Driver.AbLegacy.Cli.md`.
 
-**Resolution:** _(open)_
+**Resolution:** Resolved 2026-05-23 — extended the `SubscribeCommand.IntervalMs`
+help text to match AbCip ("Publishing interval in milliseconds (default 1000).
+PollGroupEngine floors sub-250ms values.") and added a paragraph under the
+`subscribe` section in `docs/Driver.AbLegacy.Cli.md` naming the `-i` /
+`--interval-ms` long form, the 1000 ms default, and the 250 ms floor. Regression
+test `CommandMetadataTests.SubscribeCommand_interval_ms_help_notes_PollGroupEngine_floor`
+asserts the description mentions "250".
 
 ### Driver.AbLegacy.Cli-006
 
@@ -169,7 +186,7 @@ but the documented contract drifts between the two CLIs.
 | Severity | Low |
 | Category | Code organization & conventions |
 | Location | `Commands/ProbeCommand.cs:20-22` |
-| Status | Open |
+| Status | Resolved |
 
 **Description:** `ProbeCommand` declares its `--type` option with no short alias,
 while `ReadCommand`, `WriteCommand`, and `SubscribeCommand` all declare `--type`
@@ -182,7 +199,13 @@ it silently rejected on `probe`.
 for consistency with the other three commands. (The AbCip CLI `ProbeCommand` has
 the same omission, so a cross-CLI sweep is worthwhile.)
 
-**Resolution:** _(open)_
+**Resolution:** Resolved 2026-05-23 — added the `'t'` short alias to
+`ProbeCommand.DataType`. Regression test
+`CommandMetadataTests.ProbeCommand_type_has_short_alias_t` (plus the parity test
+`Other_commands_keep_type_short_alias_t` for read/write/subscribe) asserts the
+short alias is present on every command. The same omission still exists in the
+AbCip CLI's `ProbeCommand` — flagged as a sibling sweep but out of scope for
+this module.
 
 ### Driver.AbLegacy.Cli-007
 
@@ -191,7 +214,7 @@ the same omission, so a cross-CLI sweep is worthwhile.)
 | Severity | Low |
 | Category | Testing coverage |
 | Location | `tests/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.AbLegacy.Cli.Tests/WriteCommandParseValueTests.cs` |
-| Status | Open |
+| Status | Resolved |
 
 **Description:** The only test file in the CLI test project covers
 `WriteCommand.ParseValue` and `ReadCommand.SynthesiseTagName`. Two behaviours that
@@ -210,4 +233,11 @@ Driver.AbLegacy.Cli-001. `BuildOptions` is reachable via `InternalsVisibleTo`
 tag passthrough) and an overflow-input test for `ParseValue` so the fix for
 Driver.AbLegacy.Cli-001 is locked in by a regression test.
 
-**Resolution:** _(open)_
+**Resolution:** Resolved 2026-05-23 — added `BuildOptionsTests` (five tests:
+probe disabled, device shape from Gateway+PlcType, tag passthrough, timeout
+propagation, empty tag list) covering `AbLegacyCommandBase.BuildOptions` via a
+nested `TestCommand` subclass annotated with `[Command]` to satisfy the CliFx
+analyzer. The overflow path for `ParseValue` is already covered by
+`WriteCommandParseValueTests.ParseValue_out_of_range_throws_CommandException`
+(theory with `short.Parse` + `AnalogInt` overflow inputs), added when finding
+Driver.AbLegacy.Cli-001 was resolved.