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-capability-aliases.ts

@@ -42,8 +42,8 @@ const PATTERN_ALIAS_RULES: ReadonlyArray<PatternAliasRule> = [
   {
     ruleID: "claude-thinking-legacy-alias",
     description: "Normalizes the legacy Claude Opus 4.6 thinking suffix to the canonical snapshot ID.",
-    match: (normalizedModelID) => /^claude-opus-4-6-thinking$/.test(normalizedModelID),
-    canonicalize: () => "claude-opus-4-6",
+    match: (normalizedModelID) => /^claude-opus-4-7-thinking$/.test(normalizedModelID),
+    canonicalize: () => "claude-opus-4-7",
   },
   {
     ruleID: "gemini-3.1-pro-tier-alias",