[Chore] Implement Tag Normalization/Restrictions

[smeubank]

Description

Related to the project for implement Metrics in all SDKs, and using the same project board.

All SDKs and ingestion needs to consider data normalization for Metrics (tags) as we do today for transactions. The simple requirement:

• Whatever logic the SDKs and relay use today for normalizing should apply to Metrics data as well

Parent Sentry issue: https://github.com/getsentry/sentry/issues/64541

For SDKs where Metrics has already been added, this needs to be checked and added where required. For SDKs where this has not been added it will be a requirements of the initial implementation.

Document(s)

• Develop Specs
• Metrics Normalization
• Dev Spec PII and Data Scrubbing

### SDKs
- [ ] Dev Spec Update
- [x] Check: JS Browser
- [x] Check: JS Server (node et al)
- [ ] Check: Python
- [ ] Check: PHP
- [ ] Check: Rust
- [ ] Check: .NET
- [ ] https://github.com/getsentry/sentry-java/issues/3190
- [ ] https://github.com/getsentry/sentry-react-native/issues/3578
- [ ] Golang
- [ ] Ruby
- [ ] Elixir
- [ ] iOS
- [x] Android
- [ ] Game engines
- [ ] Native

RFC

No response

Slack-Channel

discuss-ddm

Notion Document(s)

No response

Stakeholder(s)

• Armin
• Matej & Ale

Team(s)

Mobile, Web Backend, Web Frontend, Ingest