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/features/task-toast-manager/manager.test.ts

@@ -203,7 +203,7 @@ describe("TaskToastManager", () => {
         description: "Task with inherited model",
         agent: "sisyphus-junior",
         isBackground: false,
-        modelInfo: { model: "cliproxy/claude-opus-4-6", type: "inherited" as const },
+        modelInfo: { model: "cliproxy/claude-opus-4-7", type: "inherited" as const },
       }
 
       // when - addTask is called
@@ -213,7 +213,7 @@ describe("TaskToastManager", () => {
       expect(mockClient.tui.showToast).toHaveBeenCalled()
       const call = mockClient.tui.showToast.mock.calls[0][0]
       expect(call.body.message).toContain("[FALLBACK]")
-      expect(call.body.message).toContain("cliproxy/claude-opus-4-6")
+      expect(call.body.message).toContain("cliproxy/claude-opus-4-7")
       expect(call.body.message).toContain("(inherited from parent)")
     })