chore(pricing): refresh LiteLLM snapshot; MiniMax-M3 standard tier

MiniMax moved M3 to tiered pricing: the official standard tier (inputs
up to 512K) is $0.30/$1.20 per M with $0.06 cache reads, doubling above
512K. Upstream LiteLLM now carries the standard tier, so the pinned
expectation follows it; the old $0.60/$2.40 figure is the long-context
tier, not the base price anymore.

tests/minimax.test.ts

@@ -28,13 +28,14 @@ describe('MiniMax model pricing', () => {
   })
 
   it('returns official pricing for MiniMax-M3', () => {
-    // M3 is gap-filled automatically (LiteLLM, with models.dev first-party as
-    // the cross-check): $0.6/$2.4 per M, the official MiniMax direct price - not
-    // a discounted reseller rate (e.g. OpenRouter's $0.3/$1.2).
+    // MiniMax moved M3 to tiered pricing (platform.minimax.io pay-as-you-go):
+    // $0.3/$1.2 per M is the official standard tier (inputs up to 512K), with
+    // $0.6/$2.4 above 512K. The snapshot carries the standard tier, matching
+    // how other tiered models are priced here.
     const costs = getModelCosts('MiniMax-M3')
     expect(costs).not.toBeNull()
-    expect(costs!.inputCostPerToken).toBe(0.6e-6)
-    expect(costs!.outputCostPerToken).toBe(2.4e-6)
+    expect(costs!.inputCostPerToken).toBe(0.3e-6)
+    expect(costs!.outputCostPerToken).toBe(1.2e-6)
   })
 
   it('highspeed pricing is distinct from base model pricing', () => {