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, 1 insertions, 1 deletions

diff --git a/grasp-audit/src/specs/grasp01/nip01_smoke.rs b/grasp-audit/src/specs/grasp01/nip01_smoke.rs
index 9a7d7d1..8a0a4d1 100644
--- a/grasp-audit/src/specs/grasp01/nip01_smoke.rs
+++ b/grasp-audit/src/specs/grasp01/nip01_smoke.rs
@@ -297,7 +297,7 @@ mod tests {
         let relay_url = std::env::var("RELAY_URL")
             .expect("RELAY_URL environment variable must be set for integration tests");
 
-        let config = AuditConfig::ci();
+        let config = AuditConfig::isolated();
         let client = AuditClient::new(&relay_url, config)
             .await
             .expect("Failed to connect to relay");