Introduce the multi-provider seam on the host, behaviour-identical for Anthropic.
- config v2: `providers` (per-provider enable + creds), `active_provider`,
`display_order`; v1 configs migrate transparently (anthropic enabled+active).
New accessors: active_provider_id / provider_conf / enabled_providers.
- daemon/providers/: Provider ABC + normalized ProviderStatus (maps to the same
s/sr/w/wr/st/tk/to/tc/tn BLE fields), AnthropicProvider (wraps the existing
OAuth+poll+local-usage logic), StubProvider for openai/zai until M2/M3, and a
get_provider() registry.
- poll loop: polls the config-selected active provider each cycle and tags the
payload with `pv` (the brand-theme id the watch will wear). Watch->PC
`{"cmd":"prov","id":".."}` persists the active provider and repolls at once.
- clawdmeter.spec: bundle daemon.providers for the frozen exe.
- test: 7 new provider/config tests; fix a stale start_notify count assertion
(the M2 command channel means both REQ and CMD subscriptions are attempted).
Verified live: config loads as v2, active provider resolves to AnthropicProvider,
a real poll returns ok=True (s=53%, w=5%); full suite 87 passed (+7 new).
wenil