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/atlas/compaction-agent-filter.test.ts

@@ -58,7 +58,7 @@ describe("atlas hook compaction agent filtering", () => {
       join(messageDir, fileName),
       JSON.stringify({
         agent,
-        model: { providerID: "anthropic", modelID: "claude-opus-4-6" },
+        model: { providerID: "anthropic", modelID: "claude-opus-4-7" },
       }),
     )
   }

src/hooks/atlas/final-wave-approval-gate-regression.test.ts

@@ -91,7 +91,7 @@ describe("Atlas final-wave approval gate regressions", () => {
       join(messageDirectory, "msg_test001.json"),
       JSON.stringify({
         agent: "atlas",
-        model: { providerID: "anthropic", modelID: "claude-opus-4-6" },
+        model: { providerID: "anthropic", modelID: "claude-opus-4-7" },
       }),
     )
   }

src/hooks/atlas/final-wave-approval-gate.test.ts

@@ -99,7 +99,7 @@ describe("Atlas final verification approval gate", () => {
       join(messageDirectory, "msg_test001.json"),
       JSON.stringify({
         agent: "atlas",
-        model: { providerID: "anthropic", modelID: "claude-opus-4-6" },
+        model: { providerID: "anthropic", modelID: "claude-opus-4-7" },
       }),
     )
   }

src/hooks/atlas/index.test.ts

@@ -79,7 +79,7 @@ describe("atlas hook", () => {
     }
     const messageData = {
       agent,
-      model: { providerID: "anthropic", modelID: "claude-opus-4-6" },
+      model: { providerID: "anthropic", modelID: "claude-opus-4-7" },
     }
     writeFileSync(join(messageDir, "msg_test001.json"), JSON.stringify(messageData))
   }