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/context-limit-resolver.ts

@@ -20,7 +20,7 @@ function getAnthropicActualLimit(modelCacheState?: ContextLimitModelCacheState):
 }
 
 function supportsCachedAnthropicLimit(modelID: string): boolean {
-  return /^claude-(opus|sonnet)-4(?:-|\.)6(?:-high)?$/.test(modelID)
+  return /^claude-(opus|sonnet)-4(?:-|\.)(?:6|7)(?:-high)?$/.test(modelID)
 }
 
 export function resolveActualContextLimit(