O1.1: Prepare Snowflake to handle a surge of operators and users.

Although we already deployed Snowflake in Tor Browser, we want to be sure that Snowflake can handle all new users from China by preparing it with:

• add many additional Snowflake operators (coordinate with @ggus on campaign),
• monitor bottlenecks & blocking events (ongoing task for @tpo/anti-censorship),
• set up at least one more snowflake bridge (1. prepare snowflake to give more than 2 bridge, 2. coordinate with @ggus for when partnering to have more bridges)
• respond to blocking events and prevent users from getting Snowflakes that have been blocked (ongoing task for @tpo/anti-censorship).