Add pre-commit hooks for code quality (#19)

## Summary
- Add pre-commit framework with hooks for YAML, Ansible, Python, shell, TOML, JSON, and secret detection
- Fix all 91+ ansible-lint violations (variable naming, handler capitalization, changed_when)
- Fix shellcheck warnings in mise-tasks scripts
- Document pre-commit setup in README.md

## Deployment and Testing
- [x] All pre-commit hooks pass (`uvx pre-commit run --all-files`)
- [x] Test ansible playbook with `--check` mode
- [x] Run `mise run indri-services-check` after deploy

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: https://forge.tail8d86e.ts.net/eblume/blumeops/pulls/19

.ansible-lint

@@ -0,0 +1,19 @@
+---
+# Ansible-lint configuration
+
+# Set profile to production for stricter checking
+profile: production
+
+# Exclude paths
+exclude_paths:
+  - .venv/
+  - pulumi/.venv/
+
+# Make ansible-lint aware of project structure
+project_dir: ansible
+
+# Skip some rules that are too noisy for this project
+skip_list:
+  - galaxy  # Don't require galaxy metadata in roles
+  - yaml[line-length]  # Don't enforce line length limits
+  - no-handler  # Some tasks intentionally run conditionally, not as handlers