bidcollect docs update

docs/2024-06_bidcollect.md

@@ -27,18 +27,18 @@ Source types:
 
 Different data sources have different limitations:
 
-- `getHeader` polling:
+- `getHeader` polling ([code](/services/bidcollect/getheader-poller.go)):
   - The received header only has limited information, with these implications:
     - Optimistic is always `false`
     - No `builder_pubkey`
     - No bid timestamp (need to use receive timestamp)
     - getHeader bid timestamps are always when the response from polling at t=1s comes back (but not when the bid was received at a relay)
   - Some relays only allow a single `getHeader` request per slot, so we time it at `t=1s`
-- Data API polling:
+- Data API polling ([code](/services/bidcollect/data-api-poller.go):
     - Has all the necessary information
     - Due to rate limits, we only poll at specific times
-    - Polling at t-4, t-2, t-0.5, t+0.5, t+2 (see also [`services/bidcollect/data-api-poller.go`](services/bidcollect/data-api-poller.go#64-69))
-- Ultrasound websocket stream
+    - Polling at t-4, t-2, t-0.5, t+0.5, t+2 (see also [`/services/bidcollect/data-api-poller.go`](/services/bidcollect/data-api-poller.go#64-69))
+- Ultrasound websocket stream ([code](/services/bidcollect/ultrasound-stream.go):
   - doesn't expose optimistic, thus that field is always `false`
 
 ## Other notes