Update lib/pq dependency

[braams]

Sometimes, when there are no calls for several hours, the service loses its connection to the database. When calls resume, the service fails to save anything to the database and logs the following errors:

...
2024/11/27 22:04:53.975003 postgres.go:259: ERR write tcp 192.168.4.50:36174->192.168.5.25:5432: write: broken pipe
2024/11/27 22:04:54.517898 postgres.go:259: ERR write tcp 192.168.4.50:36174->192.168.5.25:5432: write: broken pipe
2024/11/27 22:04:57.975863 postgres.go:259: ERR write tcp 192.168.4.50:36174->192.168.5.25:5432: write: broken pipe
2024/11/27 22:04:58.518497 postgres.go:259: ERR write tcp 192.168.4.50:36174->192.168.5.25:5432: write: broken pipe
2024/11/27 22:05:02.519271 postgres.go:259: ERR write tcp 192.168.4.50:36174->192.168.5.25:5432: write: broken pipe
...

According to netstat, there is no TCP connection with PostgreSQL at the moment, and according to tcpdump, it is not attempting to establish the new one.

I found that there was an issue (lib/pq#870) with the same problem, which was fixed in lib/pq v1.9.0. However, heplify-server is still using v1.7.0.
Would you mind upgrading to the latest version of lib/pq?

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