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/examples/simple_audit.rs b/grasp-audit/examples/simple_audit.rs
index e363d5c..57d4ac8 100644
--- a/grasp-audit/examples/simple_audit.rs
+++ b/grasp-audit/examples/simple_audit.rs
@@ -6,8 +6,8 @@ use grasp_audit::*;
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    // Create audit config for CI testing
-    let config = AuditConfig::ci();
+    // Create audit config with shared fixtures (default for CLI)
+    let config = AuditConfig::shared();
 
     println!("GRASP Audit Example");
     println!("==================");