v1.4.0 Adds data protection for stored data

What's Changed

• feat: adds tokens to database, count tokens for prompt history by @telpirion in #18
• feat: adds evaluation "pipeline" as Cloud Run function by @telpirion in #19
• chore: adds eval results to README by @telpirion in #20
• chore: clean up dev artifacts by @telpirion in #34
• feat: removes PII from stored conversations by @telpirion in #36
• feat: adds PII protection by @telpirion in #38

Full Changelog: v1.3.2...1.4.0