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/tools/delegate-task/anthropic-categories.ts

@@ -47,7 +47,7 @@ export const ANTHROPIC_CATEGORIES: BuiltinCategoryDefinition[] = [
   },
   {
     name: "unspecified-high",
-    config: { model: "anthropic/claude-opus-4-6", variant: "max" },
+    config: { model: "anthropic/claude-opus-4-7", variant: "max" },
     description: "Tasks that don't fit other categories, high effort required",
     promptAppend: UNSPECIFIED_HIGH_CATEGORY_PROMPT_APPEND,
   },