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

.yamllint.yaml

@@ -0,0 +1,29 @@
+---
+extends: default
+
+rules:
+  line-length:
+    max: 120
+    level: warning
+  truthy:
+    allowed-values: ['true', 'false', 'yes', 'no']
+  comments:
+    min-spaces-from-content: 1
+  braces:
+    min-spaces-inside: 0
+    max-spaces-inside: 1
+  brackets:
+    min-spaces-inside: 0
+    max-spaces-inside: 0
+  indentation:
+    spaces: 2
+    indent-sequences: consistent
+  # Required for ansible-lint compatibility
+  comments-indentation: false
+  octal-values:
+    forbid-implicit-octal: true
+    forbid-explicit-octal: true
+
+ignore:
+  - .venv/
+  - pulumi/.venv/