feat(acuvim): migrate Accuenergy Acuvim II meter from Blixt L1 registry

[davmoz]

Migration of a Blixt L1 read-only meter driver into the catalog.

Driver: Accuenergy Acuvim II three-phase revenue-grade meter via Modbus RTU/TCP — one bundled FC03 float32 block; POI meter on Blixt L1 sites.

Source: the Blixt L1 driver source, version 0.4.1. Byte-for-byte except:

• Catalog header (PROTOCOL, DRIVER) added above the existing DRIVER_MANIFEST (sdm630/foxess pattern).
• meter.ac_W → canonical meter.W (Blixt L1 reads both).
• Bounded probe of the 0x4048 energy block: after 3 refused reads the driver stops asking and leaves the kWh fields out of the emit, instead of failing a read every poll (test_absent_register_settles).

Community tier, read-only, ders: [meter]. make check green.

Safety

Read-only meter; no control path, no writes.

Package or promotion evidence

Control enabled: false. No package in this PR.

[frahlg]

Automated review pass: make check and make test-driver ID=acuvim are green (3684 passed), the diff is additive-only, read-only/sign-convention rules are followed, and the manifest/Lua DRIVER block agree.

One gap before merge: manifests/acuvim.yaml has no upstream_docs entry. AGENTS.md requires recording the vendor documents a driver was decoded from ("register map, parameter changelog, API reference... at the most durable URL available"), and the driver comments already cite Accuenergy's public "ACUVIM II MODBUS MAP" document (1040E1303) — that just needs to move into the manifest's upstream_docs block (see nibe_local/myuplink for the shape) so the weekly watcher can track it.

Holding merge until that's added — should be a small follow-up push. Everything else here looks solid (community tier, verification_status: experimental is an honest claim per the PR's own evidence).

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Generated by Claude Code

[frahlg]

Rebased onto current main (kept the Blixt-migration Added bullets; acuvim sits at the top of Unreleased/Added). Added upstream_docs for the Accuenergy Acuvim II user manual (1040E1303) and Modbus map v1.07. Lua hash/size unchanged.

Local checks: make test-driver ID=acuvim (42 passed, 11 skipped) and make check (3933 passed, 1400 skipped; public boundary, manifests, index, devices, support status, sandbox).