fix(mcp): bind tenant to session — bearer context was lost over HTTP (#226)

compliance-mcp/src/server.rs

@@ -2,37 +2,33 @@ use rmcp::{
     handler::server::wrapper::Parameters, model::*, tool, tool_handler, tool_router, ServerHandler,
 };
 
-use crate::auth::current_tenant_id;
 use crate::database::{Database, DatabasePool};
 use crate::tools::{dast, findings, oscal, pentest, sbom};
 
 pub struct ComplianceMcpServer {
     pool: DatabasePool,
+    /// Tenant this session serves. Bound once at session creation (the HTTP
+    /// factory reads the bearer-set tenant while still in the request scope;
+    /// stdio passes a synthetic id) — NOT a per-request `task_local`, which is
+    /// lost across the `tokio::spawn` that runs the Streamable-HTTP session.
+    tenant_id: String,
     #[allow(dead_code)]
     tool_router: rmcp::handler::server::router::tool::ToolRouter<Self>,
 }
 
 impl ComplianceMcpServer {
-    /// Resolve the per-tenant `Database` from the bearer-set
-    /// `task_local`. Every tool handler calls this; missing context
-    /// surfaces as `internal_error` because it means the auth
-    /// middleware was misconfigured (handler ran without scope).
+    /// The per-tenant `Database` for this session.
     fn tenant_db(&self) -> Result<Database, rmcp::ErrorData> {
-        let tenant_id = current_tenant_id().ok_or_else(|| {
-            rmcp::ErrorData::internal_error(
-                "no tenant context — bearer middleware not in chain".to_string(),
-                None,
-            )
-        })?;
-        Ok(self.pool.for_tenant_id(&tenant_id))
+        Ok(self.pool.for_tenant_id(&self.tenant_id))
     }
 }
 
 #[tool_router]
 impl ComplianceMcpServer {
-    pub fn new(pool: DatabasePool) -> Self {
+    pub fn new(pool: DatabasePool, tenant_id: String) -> Self {
         Self {
             pool,
+            tenant_id,
             tool_router: Self::tool_router(),
         }
     }