chore: untrack analyze.md (keep on disk, project-local working notes)

analyze.md is a session-scoped working-notes file (~240 KB of
audit/plan material) that does not belong in the public SDK
repo. Remove from version control but keep on disk for the
author's reference.

- git rm --cached analyze.md: drop from index, file stays on disk
- add analyze.md to .gitignore so it isn't accidentally re-added
- drop the self-referential '.gitignore' entry from .gitignore
  so future edits don't need 'git add -f'

Author: maltsev-dev

.gitignore

@@ -0,0 +1,69 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# Virtual environments
+.venv/
+venv/
+env/
+ENV/
+env.bak/
+venv.bak/
+.python-version
+
+# Test / coverage / type / lint caches
+.pytest_cache/
+.coverage
+.coverage.*
+htmlcov/
+coverage.xml
+.tox/
+.nox/
+.mypy_cache/
+.ruff_cache/
+.hypothesis/
+
+# IDE / editor
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# Secrets / local config
+.env
+.env.local
+.env.*.local
+*.pem
+*.key
+
+# Claude Code / claude-flow project-local state
+.claude/
+.claude-flow/
+CLAUDE.md
+
+# Project-local working notes (kept on disk, not in VCS)
+analyze.md