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/merge-categories.test.ts

@@ -71,7 +71,7 @@ describe("mergeCategories", () => {
   it("user overrides merge with defaults", () => {
     //#given
     const userCategories = {
-      "ultrabrain": { model: "anthropic/claude-opus-4-6" },
+      "ultrabrain": { model: "anthropic/claude-opus-4-7" },
     }
 
     //#when
@@ -79,6 +79,6 @@ describe("mergeCategories", () => {
 
     //#then
     expect(result["ultrabrain"]).toBeDefined()
-    expect(result["ultrabrain"].model).toBe("anthropic/claude-opus-4-6")
+    expect(result["ultrabrain"].model).toBe("anthropic/claude-opus-4-7")
   })
 })