Database cleanup and renumbering

- Closed 82 duplicate issues
- Deleted 330 test/duplicate issues
- Implemented bd renumber command with proper text reference updates
- Cleaned database: 674 → 344 issues (49% reduction)
- All issues now numbered bd-1 through bd-344
- Added RPC infrastructure (Phase 1) for daemon support
- Delete helper scripts for cleanup operations

Fixes: bd-696, bd-667, bd-698
Related: bd-695 (Epic: Database cleanup)
Amp-Thread-ID: https://ampcode.com/threads/T-456af77c-8b7f-4004-9027-c37b95e10ea5
Co-authored-by: Amp <amp@ampcode.com>

delete_remaining_tests.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+# Delete remaining test issues from current database
+
+set -e
+
+echo "Deleting remaining test issues..."
+echo ""
+
+# Get current test issues from database
+test_ids=$(./bd list --status open --json --no-auto-import | jq -r '.[] | select(.title | test("^(parallel_test|race_test|stress_test|final_test|final_review_test|verification_)")) | .id')
+
+count=$(echo "$test_ids" | wc -l | tr -d ' ')
+echo "Found $count test issues to delete"
+echo ""
+
+# Delete each one
+for id in $test_ids; do
+    ./bd delete "$id" --force --no-auto-import 2>&1 | grep -E "(✓|Error)" || true
+done
+
+echo ""
+echo "Done! Deleted test issues."
+echo ""
+./bd stats --no-auto-import