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/shared/model-error-classifier.test.ts

@@ -31,7 +31,7 @@ describe("model-error-classifier", () => {
     //#given
     const error = {
       message:
-        "All credentials for model claude-opus-4-6-thinking are cooling down [retrying in ~5 days attempt #1]",
+        "All credentials for model claude-opus-4-7-thinking are cooling down [retrying in ~5 days attempt #1]",
     }
 
     //#when