refactor: rename AuditMode variants and change CLI default to shared

Breaking change: Renamed AuditMode enum variants for clarity:
- AuditMode::CI -> AuditMode::Isolated (fresh fixtures per test)
- AuditMode::Production -> AuditMode::Shared (reuse fixtures across tests)

Config constructors renamed (with deprecated aliases):
- AuditConfig::ci() -> AuditConfig::isolated()
- AuditConfig::production() -> AuditConfig::shared()

CLI default changed from 'ci' to 'shared' mode, which enables
fixture caching across tests. This fixes the issue where fixtures
were being re-created for every test in CLI mode.

Fixture caching behavior:
- Shared mode (CLI default): Uses client's cache, fixtures reused
- Isolated mode (for cargo test): Local cache per TestContext

1 files changed, 2 insertions, 2 deletions

diff --git a/grasp-audit/src/lib.rs b/grasp-audit/src/lib.rs
index 6df240f..655ee83 100644
--- a/grasp-audit/src/lib.rs
+++ b/grasp-audit/src/lib.rs
@@ -16,8 +16,8 @@
 //!
 //! #[tokio::main]
 //! async fn main() -> Result<(), Box<dyn std::error::Error>> {
-//!     // Create audit client for CI testing
-//!     let config = AuditConfig::ci();
+//!     // Create audit client with shared fixtures (default for CLI)
+//!     let config = AuditConfig::shared();
 //!     let client = AuditClient::new("ws://localhost:7000", config).await?;
 //!
 //!     // Run smoke tests