Auto: ablegacy-7 — array contiguous block addressing

Closes #250

docs/drivers/AbLegacy-Test-Fixture.md

@@ -36,6 +36,12 @@ supplies a `FakeAbLegacyTag`.
 
 - `AbLegacyAddressTests` — PCCC address parsing for SLC / MicroLogix / PLC-5
   / LogixPccc-mode (`N7:0`, `F8:12`, `B3:0/5`, etc.)
+- `AbLegacyArrayTests` — PR 7 array contiguous-block addressing: parser
+  positives + rejects for `,N` / `[N]` suffixes, options-override
+  (`ArrayLength`), driver `IsArray` discovery, and array decoding for N / F /
+  L / B files (Rockwell convention: one BOOL per word for `B3:0,10`). Latency
+  benchmark against the Docker fixture is a perf-flagged integration case in
+  `AbLegacyArrayReadTests` — runs only when ab_server is reachable.
 - `AbLegacyCapabilityTests` — data type mapping, read-only enforcement
 - `AbLegacyReadWriteTests` — read + write happy + error paths against the fake
 - `AbLegacyBitRmwTests` — bit-within-DINT read-modify-write serialization via