Enhance environment variable parsing and account snapshot validation

- Introduced `normalizeEnvValue` function to improve handling of environment variable values, including trimming, unquoting, and stripping inline comments.
- Updated `resolveSymbolFromEnv` and parsing functions to utilize the new normalization logic.
- Added `validateAccountSnapshotForSymbol` function to validate account snapshots, ensuring numeric fields are correctly formatted and flagging any issues.
- Implemented tests for environment variable parsing and account snapshot validation to ensure robustness and correctness.

tests/config-inline-comments.test.ts

@@ -0,0 +1,45 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const ORIGINAL_ENV = { ...process.env };
+
+beforeEach(() => {
+  process.env = { ...ORIGINAL_ENV };
+});
+
+afterEach(() => {
+  process.env = { ...ORIGINAL_ENV };
+});
+
+async function loadConfig() {
+  vi.resetModules();
+  return await import("../src/config");
+}
+
+describe("config env parsing", () => {
+  it("strips shell-style inline comments from symbol values", async () => {
+    process.env.EXCHANGE = "standx";
+    process.env.STANDX_SYMBOL = "BTC-USD # comment";
+
+    const { resolveSymbolFromEnv } = await loadConfig();
+    expect(resolveSymbolFromEnv()).toBe("BTC-USD");
+  });
+
+  it("parses numeric maker-points env values with inline comments", async () => {
+    process.env.EXCHANGE = "standx";
+    process.env.MAKER_POINTS_STOP_LOSS_USD = "1 # comment";
+    process.env.MAKER_POINTS_CLOSE_THRESHOLD = "2 ; comment";
+
+    const { makerPointsConfig } = await loadConfig();
+    expect(makerPointsConfig.stopLossUsd).toBe(1);
+    expect(makerPointsConfig.closeThreshold).toBe(2);
+  });
+
+  it("parses boolean maker-points env values with inline comments", async () => {
+    process.env.EXCHANGE = "standx";
+    process.env.MAKER_POINTS_BAND_10_30 = "false # comment";
+
+    const { makerPointsConfig } = await loadConfig();
+    expect(makerPointsConfig.enableBand10To30).toBe(false);
+  });
+});
+