Add MS_SimpleExport bot + hardened Linux export-runner

MS_SimpleExport is a market-data exporter (M1/Tick -> zipped binary), driven
headless via the official cTrader-console Docker image. This adds the bot and a
hardened bash driver that runs the scrape on a Linux host, spawning one ephemeral
console container per backtest window.

- src/MS_SimpleExport: the cBot; csproj aligned to the repo's Linux template
  (AlgoPublish=false, cTrader.Automate 1.*-*).
- scripts/export-runner.sh: hardened port of the Unraid driver -- retry-then-abort
  on transient failure, gap-aware resume, current-month end-date clamp, 3-way run
  classification with a per-run timeout, and ZIP validation before rename.
- scripts/export.env.example: deployment config template (real values live in the
  gitignored runtime/export.env).
- docs/export-runner-quirks.md: the multi-lens audit findings and hardening decisions.
- .gitignore: ignore runtime/ (secrets, the placed .algo, the symbol list).

scripts/export.env.example

@@ -0,0 +1,17 @@
+# Deployment config for scripts/export-runner.sh.
+# Copy this to runtime/export.env (gitignored) and fill in. Never commit the real file.
+
+# Output data directory on THIS host — the cBot writes here via the container mount.
+# On this machine the Unraid "TickData" share is NFS-mounted at /mnt/tickdata, so the
+# Pepperstone subfolder is:
+HOST_DATA_PATH="/mnt/tickdata/Pepperstone"
+
+# cTrader ID login (email) and trading account number the console uses to pull data.
+CTID="you@example.com"
+ACCOUNT="0000000"
+
+# --- Optional overrides (the script derives sensible defaults from the repo) ---
+# Must contain MS_SimpleExport.algo + password.txt:
+#HOST_ROBOTS_PATH="$REPO_ROOT/runtime/Robots"
+#SYMBOL_FILE="$REPO_ROOT/runtime/ScrapeSymbols.txt"
+#IMAGE="ghcr.io/spotware/ctrader-console:latest"