refactor(models): bump claude-opus-4-6 to claude-opus-4-7 across fallback chains, categories, and hooks

Updates the canonical Anthropic Opus model in every fallback chain
(sisyphus, oracle, prometheus, metis, momus, visual-engineering,
ultrabrain, deep, artistry, unspecified-high), the unspecified-high
category default, the think-mode HIGH_VARIANT_MAP, the Claude Code
alias map, the claude-thinking legacy alias, the context-limit GA
regex, and event.ts fallback strings.

Widens supportsCachedAnthropicLimit to accept both claude-*-4-6 and
claude-*-4-7 so the 1M context cache still applies across the bump.

Regenerates the bundled model-capabilities snapshot from models.dev
and the model-fallback snapshot to match the new source output.

src/plugin/chat-params.test.ts

@@ -48,7 +48,7 @@ describe("createChatParamsHandler", () => {
     const input = {
       sessionID: "ses_chat_params",
       agent: { name: "sisyphus" },
-      model: { providerID: "opencode", modelID: "claude-opus-4-6" },
+      model: { providerID: "opencode", modelID: "claude-opus-4-7" },
       provider: { id: "opencode" },
       message: {},
     }