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/plugin-handlers/agent-config-handler-agents-skills.test.ts

@@ -81,7 +81,7 @@ describe("applyAgentConfig .agents skills", () => {
 
     // when
     await applyAgentConfig({
-      config: { model: "anthropic/claude-opus-4-6", agent: {} },
+      config: { model: "anthropic/claude-opus-4-7", agent: {} },
       pluginConfig: createPluginConfig(),
       ctx: { directory },
       pluginComponents: createPluginComponents(),
@@ -111,7 +111,7 @@ describe("applyAgentConfig .agents skills", () => {
 
     // when
     await applyAgentConfig({
-      config: { model: "anthropic/claude-opus-4-6", agent: {} },
+      config: { model: "anthropic/claude-opus-4-7", agent: {} },
       pluginConfig: createPluginConfig(),
       ctx: { directory: "/tmp/project" },
       pluginComponents: createPluginComponents(),