feat: Implement initial schema and add various API, service, and management command enhancements across the application.

backend/.flake8

@@ -0,0 +1,37 @@
+[flake8]
+# Match Black and Ruff line length
+max-line-length = 120
+
+# Ignore rules that conflict with Black formatting or are handled by other tools
+ignore =
+    # E203: whitespace before ':' - Black intentionally does this
+    E203,
+    # E501: line too long - handled by Black/Ruff
+    E501,
+    # W503: line break before binary operator - conflicts with Black
+    W503,
+    # E226: missing whitespace around arithmetic operator - Black style
+    E226,
+    # W391: blank line at end of file - not critical
+    W391,
+    # C901: function is too complex - these are intentional for complex business logic
+    C901,
+    # F401: imported but unused - star imports for choice registration are intentional
+    F401
+
+# Exclude common directories
+exclude =
+    .git,
+    __pycache__,
+    migrations,
+    .venv,
+    venv,
+    build,
+    dist,
+    *.egg-info,
+    node_modules,
+    htmlcov,
+    .pytest_cache
+
+# Complexity threshold - set high since we have intentional complex functions
+max-complexity = 50