refactor(quota): move provider quota logic into adapter layer, add unit tests

- Extract all Anthropic credential/API logic into claude-local/src/server/quota.ts
- Extract all OpenAI/WHAM credential/API logic into codex-local/src/server/quota.ts
- Add optional getQuotaWindows() to ServerAdapterModule in adapter-utils
- Rewrite quota-windows.ts as a 29-line thin aggregator with zero provider knowledge
- Wire getQuotaWindows into adapter registry for claude-local and codex-local
- Add 47 unit tests covering toPercent, secondsToWindowLabel, WHAM normalization,
  readClaudeToken, readCodexToken, fetchClaudeQuota, fetchCodexQuota, fetchWithTimeout
- Add 8 unit tests covering parseDateRange validation and byProvider pro-rata math

Adding a third provider now requires only touching that provider's adapter.

server/src/adapters/registry.ts

@@ -3,12 +3,14 @@ import {
   execute as claudeExecute,
   testEnvironment as claudeTestEnvironment,
   sessionCodec as claudeSessionCodec,
+  getQuotaWindows as claudeGetQuotaWindows,
 } from "@paperclipai/adapter-claude-local/server";
 import { agentConfigurationDoc as claudeAgentConfigurationDoc, models as claudeModels } from "@paperclipai/adapter-claude-local";
 import {
   execute as codexExecute,
   testEnvironment as codexTestEnvironment,
   sessionCodec as codexSessionCodec,
+  getQuotaWindows as codexGetQuotaWindows,
 } from "@paperclipai/adapter-codex-local/server";
 import { agentConfigurationDoc as codexAgentConfigurationDoc, models as codexModels } from "@paperclipai/adapter-codex-local";
 import {
@@ -71,6 +73,7 @@ const claudeLocalAdapter: ServerAdapterModule = {
   models: claudeModels,
   supportsLocalAgentJwt: true,
   agentConfigurationDoc: claudeAgentConfigurationDoc,
+  getQuotaWindows: claudeGetQuotaWindows,
 };
 
 const codexLocalAdapter: ServerAdapterModule = {
@@ -82,6 +85,7 @@ const codexLocalAdapter: ServerAdapterModule = {
   listModels: listCodexModels,
   supportsLocalAgentJwt: true,
   agentConfigurationDoc: codexAgentConfigurationDoc,
+  getQuotaWindows: codexGetQuotaWindows,
 };
 
 const cursorLocalAdapter: ServerAdapterModule = {