feat: RTL_433 protocol database import - iteration 1/5

- Expanded protocol database from 18 → 299 signatures (16.6x increase)
- Imported 281 protocols from RTL_433 open-source database (286 total devices)
- Created automated import script: scripts/import_rtl433_protocols.py
- Generated rtl433_protocols_imported.py with timing/frequency/modulation data
- Updated protocol_database.py to include RTL433_PROTOCOLS
- All 26 tests passing

Breakdown by category:
  - Weather: 116 protocols
  - Sensors: 36 protocols
  - TPMS: 25 protocols
  - Security: 23 protocols
  - Home Automation: 18 protocols
  - Other: 50+ protocols

Frequency coverage:
  - 433.92 MHz: 248 protocols
  - 315.00 MHz: 32 protocols
  - 915.00 MHz: 1 protocol

This provides comprehensive coverage of Sub-GHz IoT devices for accurate
identification from raw RF captures.

start_web.sh

@@ -16,14 +16,24 @@ fi
 
 echo "✅ Python 3 found"
 
-# Check if in project directory
-if [ ! -f "src/api/main.py" ]; then
+# More robust project directory detection
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+PROJECT_ROOT="$SCRIPT_DIR"
+
+# Check for multiple project markers
+if [ ! -f "$PROJECT_ROOT/src/api/main_simple.py" ] || \
+   [ ! -f "$PROJECT_ROOT/CLAUDE.md" ] || \
+   [ ! -d "$PROJECT_ROOT/src/database" ]; then
     echo "❌ Not in project directory"
-    echo "Please run from /home/dell/coding/giglez"
+    echo "Please run from: $PROJECT_ROOT"
+    echo "Or use: cd /home/dell/coding/giglez && ./start_web.sh"
     exit 1
 fi
 
-echo "✅ Project directory confirmed"
+# Change to project root if needed
+cd "$PROJECT_ROOT"
+
+echo "✅ Project directory confirmed ($PROJECT_ROOT)"
 
 # Check database
 if [ -f "giglez.db" ]; then