log chat sessions to database

server/db/pg/schema/schema.ts

@@ -65,6 +65,11 @@ export const orgs = pgTable("orgs", {
     ) // where 0 = dont keep logs and -1 = keep forever and 9001 = end of the following year
         .notNull()
         .default(0),
+    settingsLogRetentionDaysAISessions: integer(
+        "settingsLogRetentionDaysAISessions"
+    ) // where 0 = dont keep logs and -1 = keep forever and 9001 = end of the following year
+        .notNull()
+        .default(0),
     sshCaPrivateKey: text("sshCaPrivateKey"), // Encrypted SSH CA private key (PEM format)
     sshCaPublicKey: text("sshCaPublicKey"), // SSH CA public key (OpenSSH format)
     isBillingOrg: boolean("isBillingOrg"),
@@ -1899,6 +1904,70 @@ export const aiBudgetBreachEvents = pgTable(
     ]
 );
 
+// Logs the aggregated prompt + response for a single AI gateway request, for
+// session replay. One row per request (not per streaming chunk). `sessionId`
+// is a fresh random id per row for now - no cross-request correlation yet,
+// but the column exists so a future pass can link multiple rows into a real
+// multi-turn session.
+export const aiSessionLog = pgTable(
+    "aiSessionLog",
+    {
+        id: serial("id").primaryKey(),
+        sessionId: varchar("sessionId").notNull(),
+        orgId: varchar("orgId").references(() => orgs.orgId, {
+            onDelete: "cascade"
+        }),
+        providerId: integer("providerId")
+            .notNull()
+            .references(() => aiProviders.providerId, { onDelete: "cascade" }),
+        capability: varchar("capability").notNull(),
+        resourceId: integer("resourceId").references(
+            () => resources.resourceId,
+            { onDelete: "cascade" }
+        ),
+        siteResourceId: integer("siteResourceId").references(
+            () => siteResources.siteResourceId,
+            { onDelete: "cascade" }
+        ),
+        userId: varchar("userId").references(() => users.userId, {
+            onDelete: "set null"
+        }),
+        requestedModel: varchar("requestedModel"),
+        isStream: boolean("isStream").notNull().default(false),
+        requestBody: text("requestBody"),
+        responseBody: text("responseBody"),
+        // True if requestBody/responseBody were cut short at
+        // AI_SESSION_LOG_MAX_BODY_CHARS before storage.
+        truncated: boolean("truncated").notNull().default(false),
+        statusCode: integer("statusCode"),
+        createdAt: bigint("createdAt", { mode: "number" }).notNull() // epoch ms
+    },
+    (t) => [
+        index("idx_ai_session_log_org_created").on(t.orgId, t.createdAt),
+        index("idx_ai_session_log_org_provider_created").on(
+            t.orgId,
+            t.providerId,
+            t.createdAt
+        ),
+        index("idx_ai_session_log_org_resource_created").on(
+            t.orgId,
+            t.resourceId,
+            t.createdAt
+        ),
+        index("idx_ai_session_log_org_site_resource_created").on(
+            t.orgId,
+            t.siteResourceId,
+            t.createdAt
+        ),
+        index("idx_ai_session_log_org_user_created").on(
+            t.orgId,
+            t.userId,
+            t.createdAt
+        ),
+        index("idx_ai_session_log_session").on(t.sessionId)
+    ]
+);
+
 export type Org = InferSelectModel<typeof orgs>;
 export type User = InferSelectModel<typeof users>;
 export type Site = InferSelectModel<typeof sites>;
@@ -1992,6 +2061,7 @@ export type AiModel = InferSelectModel<typeof aiModels>;
 export type AiBudget = InferSelectModel<typeof aiBudgets>;
 export type AiUsageRecord = InferSelectModel<typeof aiUsageRecords>;
 export type AiBudgetBreachEvent = InferSelectModel<typeof aiBudgetBreachEvents>;
+export type AiSessionLog = InferSelectModel<typeof aiSessionLog>;
 export type ResourceAiProvider = InferSelectModel<typeof resourceAiProviders>;
 export type SiteResourceAiProvider = InferSelectModel<
     typeof siteResourceAiProviders