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/agents/custom-agent-orchestrator-visibility.test.ts

@@ -2,13 +2,13 @@ import { describe, expect, spyOn, test } from "bun:test"
 import { createBuiltinAgents } from "./builtin-agents"
 import * as shared from "../shared"
 
-const TEST_DEFAULT_MODEL = "anthropic/claude-opus-4-6"
+const TEST_DEFAULT_MODEL = "anthropic/claude-opus-4-7"
 
 describe("createBuiltinAgents custom agent visibility", () => {
 	test("#given runtime custom agents #when orchestrator prompts are built #then custom agents are not advertised for automatic delegation", async () => {
 		//#given
 		const fetchSpy = spyOn(shared, "fetchAvailableModels").mockResolvedValue(
-			new Set(["anthropic/claude-opus-4-6", "openai/gpt-5.4"])
+			new Set(["anthropic/claude-opus-4-7", "openai/gpt-5.4"])
 		)
 
 		try {