build: token-monitor v0.1.0 — modular LLM API quota visibility

Implements modular provider probing with two distinct header schemas:
- Teams direct (unified schema): 5h/7d utilization floats, status, reset countdown
- Shelley proxy (classic schema): token/request counts + Exedev-Gateway-Cost (USD/call)
- api-ateam: reports no billing data (confirmed non-existent by recon)

Key: uses claude-haiku-4-5-20251001 for minimal probe calls (1 token).
Rate-limit headers present on ALL responses (200 and 429).

113/113 tests passing.

Built from Face recon (trentuna/a-team#91) — live header capture confirmed
unified schema with utilization floats replaces old per-count schema.

logger.js

@@ -0,0 +1,19 @@
+/**
+ * logger.js — persistent JSONL log to ~/.logs/token-monitor/YYYY-MM-DD.jsonl
+ */
+
+import { appendFileSync, mkdirSync } from 'fs';
+import { homedir } from 'os';
+import { join } from 'path';
+
+export function logRun(data) {
+  const dir = join(homedir(), '.logs', 'token-monitor');
+  mkdirSync(dir, { recursive: true });
+  const file = join(dir, `${new Date().toISOString().slice(0, 10)}.jsonl`);
+  appendFileSync(file, JSON.stringify({ ts: new Date().toISOString(), ...data }) + '\n');
+}
+
+export function getLogPath() {
+  const today = new Date().toISOString().slice(0, 10);
+  return join(homedir(), '.logs', 'token-monitor', `${today}.jsonl`);
+}