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/fallback.cliproxyapi-matrix.test.ts

@@ -59,7 +59,7 @@ function createChatMessageHandlerHooks(
 
 const PRIMARY_MODEL = {
   providerID: PROVIDER_ID,
-  modelID: "claude-opus-4-6",
+  modelID: "claude-opus-4-7",
 }
 
 const PRIMARY_MODEL_STRING = `${PRIMARY_MODEL.providerID}/${PRIMARY_MODEL.modelID}`
@@ -313,7 +313,7 @@ async function triggerSessionStatusRetry(
           type: "retry",
           attempt: 1,
           message:
-            "All credentials for model claude-opus-4-6 are cooling down [retrying in 7m 56s attempt #1]",
+            "All credentials for model claude-opus-4-7 are cooling down [retrying in 7m 56s attempt #1]",
           next: 476,
         },
       },