fix: use type-only imports and update import source in inject-audit-data-v2

Convert Script, PrismaClient, and Prisma imports to type-only imports since
they are only used in type positions. Update PrismaClient/Prisma import source
from "../../dist" to "@sourcebot/db" to match the pattern in scriptRunner.ts.
Also fix broken API reference link in sizing guide docs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: msukkari

docs/docs/deployment/sizing-guide.mdx

@@ -56,7 +56,7 @@ Audit logging is an enterprise feature and is only available with an [enterprise
 **Estimated storage per audit event: ~350 bytes** (including row data and indexes).
 
 <Info>
-The table below assumes 50 events per user per day. The actual number depends on usage patterns — each user action (code search, file view, navigation, Ask chat, etc.) creates one audit event. Users who interact via [MCP](/docs/features/mcp-server) or the [API](/docs/api-reference/search) tend to generate significantly more events than web-only users, so your real usage may vary.
+The table below assumes 50 events per user per day. The actual number depends on usage patterns — each user action (code search, file view, navigation, Ask chat, etc.) creates one audit event. Users who interact via [MCP](/docs/features/mcp-server) or the API tend to generate significantly more events than web-only users, so your real usage may vary.
 </Info>
 
 | Team size | Avg events / user / day | Daily events | Monthly storage | 6-month storage |

packages/db/tools/scripts/inject-audit-data-v2.ts

@@ -1,5 +1,5 @@
-import { Script } from "../scriptRunner";
-import { PrismaClient, Prisma } from "../../dist";
+import type { Script } from "../scriptRunner";
+import type { PrismaClient, Prisma } from "@sourcebot/db";
 import { confirmAction } from "../utils";
 
 // User profile: defines how a user interacts with Sourcebot