Update spec file to build version 1.1.9 which includes critical fixes:
- WARNING log level for release builds (eliminates INFO spam)
- Silent handling of optional TOML config fields
- Multi-architecture support (removes x86_64 hardcoding)

Fixes excessive verbosity in RPM builds on aarch64 systems.

- Change -std=c11 to -std=gnu11 to support ##__VA_ARGS__ extension
- Add -Wp,-U_FORTIFY_SOURCE to debug builds to prevent glibc warning
- Remove unused function remove_existing_account_sections from config.c

- Add session state tracking to prevent orphaned SSH agents
- SSH agents now persist after gitswitch exits for use by git commands
- Kill orphaned agents from previous runs when switching accounts
- Create current.sock symlink for easy shell integration
- Show shell integration tip after successful switch

To use persistent SSH in your shell, add to your rc file:
  export SSH_AUTH_SOCK=$XDG_RUNTIME_DIR/gitswitch-ssh/current.sock

When display_colorize was called twice in the same printf expression,
the single static buffer would be overwritten before printf could use
both values. Now uses 4 rotating buffers to handle multiple calls.

Without fflush, the final status message could be lost if the
program exits before the output buffer is flushed.

Show detailed progress when switching accounts:
- Account name and email being switched to
- Git config scope (local/global) with warning if falling back
- SSH key load status
- SSH connection verification status (when successful)
- GPG signing status (when enabled)
- Clear error indicators [!!] for failures
- Dry run mode indicators [--]

- Use git@github.com instead of github.com for SSH tests
- Use ssh -T (no TTY) since git hosts don't allow shell commands
- Check for success messages in output instead of exit code
  (GitHub returns exit 1 even on successful auth)
- Downgrade SSH test failures to debug level since they're optional

Previously, if gitswitch crashed or the system rebooted, stale socket
files would remain and prevent new ssh-agent instances from starting.
Now checks for and removes stale sockets before starting a new agent.

DEBUG builds use INFO level, release builds use WARNING level

- toml_get_string/integer/boolean return -1 silently for missing keys
- config.c clears errors after optional field lookups for safety

- git_set_config now verifies against the same scope it wrote to
- git_test_config now uses the scope parameter instead of effective config
- SSH command uses StrictHostKeyChecking=accept-new and LogLevel=ERROR
  to suppress 'permanently added to known hosts' messages