Fixup eventlogging deploy guide

I had to manually hack some things to get the deployment through successfully. This documents those changes.

deploy-guides/0001-eventlog-importing.md

@@ -27,12 +27,36 @@ create table heap_event (
     heap_event_id bigserial primary key,
     import_id bigserial not null references eventlog_import (import_id),
     package_id bigserial not null references package (package_id),
-    timestamp int,
+    timestamp bigint,
     measure heap_measure not null,
-    value integer
+    value bigint
 );
 ```
 
+### SQL privileges
+
+Read and write privs for the script runner.
+
+Read privs for grafana.
+
+*During deployment, privileges were actually applied with trial and error. This
+was written after the fact. Caveat emptor.*
+
+```sql
+grant insert, select
+on eventlog_import, heap_event, package
+to ghc_perf;
+;
+grant usage
+on eventlog_import_import_id_seq,
+   package_package_id_seq,
+   heap_event_heap_event_id_seq
+to ghc_perf;
+;
+grant select
+on eventlog_import, heap_event, package
+to ghc_perf_web;
+```
 
 ## Followup