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/cli/model-fallback.test.ts

@@ -381,7 +381,7 @@ describe("generateModelConfig", () => {
       const result = generateModelConfig(config)
 
       // #then
-      expect(result.agents?.sisyphus?.model).toBe("anthropic/claude-opus-4-6")
+      expect(result.agents?.sisyphus?.model).toBe("anthropic/claude-opus-4-7")
     })
 
     test("Sisyphus is created when multiple fallback providers are available", () => {
@@ -398,7 +398,7 @@ describe("generateModelConfig", () => {
       const result = generateModelConfig(config)
 
       // #then
-      expect(result.agents?.sisyphus?.model).toBe("anthropic/claude-opus-4-6")
+      expect(result.agents?.sisyphus?.model).toBe("anthropic/claude-opus-4-7")
     })
 
     test("Sisyphus resolves to gpt-5.4 medium when only OpenAI is available", () => {
@@ -668,7 +668,7 @@ describe("generateModelConfig", () => {
       const result = generateModelConfig(config)
 
       // #then should prefer native anthropic over gateway
-      expect(result.agents?.sisyphus?.model).toBe("anthropic/claude-opus-4-6")
+      expect(result.agents?.sisyphus?.model).toBe("anthropic/claude-opus-4-7")
     })
   })