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/model-format-normalizer.test.ts

@@ -9,8 +9,8 @@ describe("normalizeModelFormat", () => {
     })
 
     it("handles provider with multiple slashes", () => {
-      const result = normalizeModelFormat("anthropic/claude-opus-4-6/max")
-      expect(result).toEqual({ providerID: "anthropic", modelID: "claude-opus-4-6/max" })
+      const result = normalizeModelFormat("anthropic/claude-opus-4-7/max")
+      expect(result).toEqual({ providerID: "anthropic", modelID: "claude-opus-4-7/max" })
     })
 
     it("returns undefined for malformed string without separator", () => {