refactor: move all remaining files to orig/ directory

Completed clean root directory structure:
- Root now contains only: .git, .env, docs/, orig/
- Moved all remaining files and directories to orig/:
  - Config files (.claude, .dockerignore, .drone.yml, etc.)
  - All .env variants (except active .env)
  - Git config (.gitconfig, .github, .gitignore, etc.)
  - Tool configs (.golangci.yml, .revive.toml, etc.)
  - Documentation (*.md files, @prompts)
  - Build files (Dockerfiles, Makefile, go.mod, go.sum)
  - Docker compose files
  - All source directories (scripts, tests, tools, etc.)
  - Runtime directories (logs, monitoring, reports)
  - Dependency files (node_modules, lib, cache)
  - Special files (--delete)

- Removed empty runtime directories (bin/, data/)

V2 structure is now clean:
- docs/planning/ - V2 planning documents
- orig/ - Complete V1 codebase preserved
- .env - Active environment config (not in git)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

orig/scripts/fetch_arbiscan_tx.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [[ $# -ne 1 ]]; then
+  echo "Usage: $0 <tx_hash>" >&2
+  exit 1
+fi
+
+if [[ -z "${ARBISCAN_API_KEY:-}" ]]; then
+  echo "Error: ARBISCAN_API_KEY environment variable is required." >&2
+  exit 1
+fi
+
+TX_HASH="$1"
+
+# Prefer the newer V2 endpoint; fall back to V1 if it fails (for backwards compatibility)
+response=$(curl -s "https://api.arbiscan.io/v2/api?module=proxy&action=eth_getTransactionByHash&txhash=${TX_HASH}&apikey=${ARBISCAN_API_KEY}")
+status=$(echo "$response" | jq -r '.status' 2>/dev/null || echo "")
+
+if [[ "$status" == "1" || "$status" == "0" && "$response" == *"result"* ]]; then
+  echo "$response"
+  exit 0
+fi
+
+# Fallback to legacy V1 endpoint
+curl -s "https://api.arbiscan.io/api?module=proxy&action=eth_getTransactionByHash&txhash=${TX_HASH}&apikey=${ARBISCAN_API_KEY}"