Update state.json and development plan to reflect actual progress (~15%)

- state.json: Phase 5 status changed to pending, next steps updated
- DEVELOPMENT_PLAN.md v1.1: Added actual progress, verified current state,
  renumbered phases 5-9, marked all remaining work as PENDING
- Deleted outdated plans (BACKEND_TEST_PLAN, DATA_LOADING_VERIFICATION,
  DOCKER_MIGRATION_PLAN, ENDPOINT_AUDIT, ROADMAP, SIMPLIFICATION_PLAN,
  STATEMENT_OF_INTENT, backend/TEST_PLAN)
- Added new files: DEVELOPMENT_PLAN.md, backend/ARCHITECTURAL_REPORT.md,
  backend/SIMPLIFICATION_SUMMARY.md, backend/run.py, backend/.dockerignore

backend/fix_init.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""Fix schemas/__init__.py by removing proto_messages and protocol_constants imports."""
+
+init_path = 'app/schemas/__init__.py'
+
+with open(init_path, 'r') as f:
+    lines = f.readlines()
+
+# Find and remove the proto_messages import block
+new_lines = []
+skip_until_close_paren = False
+skip_comment = False
+
+i = 0
+while i < len(lines):
+    line = lines[i]
+    
+    # Skip proto_messages import block
+    if 'from app.schemas.proto_messages import' in line:
+        # Skip until we find the closing paren
+        while i < len(lines) and ')' not in lines[i]:
+            i += 1
+        i += 1  # skip the closing paren line
+        continue
+    
+    # Skip protocol_constants import block
+    if 'from app.schemas.protocol_constants import' in line:
+        while i < len(lines) and ')' not in lines[i]:
+            i += 1
+        i += 1
+        continue
+    
+    # Skip proto_messages and protocol_constants entries in __all__
+    if '# Proto Messages' in line:
+        skip_comment = True
+        i += 1
+        continue
+    
+    if '# Protocol Constants' in line:
+        i += 1
+        continue
+    
+    if skip_comment:
+        # Skip lines until we hit the next comment or end of __all__
+        if line.strip().startswith('"') and not line.strip().startswith('"):'):
+            # This is still part of the proto/protocol entries
+            i += 1
+            continue
+        else:
+            skip_comment = False
+            new_lines.append(line)
+            i += 1
+            continue
+    
+    new_lines.append(line)
+    i += 1
+
+with open(init_path, 'w') as f:
+    f.writelines(new_lines)
+
+print(f"Fixed {init_path}")
+print(f"Original: {len(lines)} lines, New: {len(new_lines)} lines")