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/hooks/runtime-fallback/dispose.test.ts

@@ -125,10 +125,10 @@ describe("createRuntimeFallbackHook dispose", () => {
     const fallbackTimeout = setTimeout(() => {}, 60_000)
 
     capturedDeps?.sessionStates.set("session-1", {
-      originalModel: "anthropic/claude-opus-4-6",
+      originalModel: "anthropic/claude-opus-4-7",
       currentModel: "openai/gpt-5.4",
       fallbackIndex: 1,
-      failedModels: new Map([["anthropic/claude-opus-4-6", 1]]),
+      failedModels: new Map([["anthropic/claude-opus-4-7", 1]]),
       attemptCount: 1,
     })
     capturedDeps?.sessionLastAccess.set("session-1", Date.now())