1647730 - All-process Rust API implementation

Status: RESOLVED FIXED

(Toolkit :: Telemetry, task, P3)

Description

[Chris H-C :chutten]

Now we should expand our Rust Specific Metrics API to support being called on any process. This will involve a few things:

1. Decide which non-commutative operations mechanism to adopt based on complexity (and update the docs to the decision's result):
   • Permit non-commutative actions if they come from only one process, or
   • Forbid any non-commutative actions on any non-main process
2. Bolster the IPC implementation to support all child process types, not just content processes
   • (See, for example, how the Telemetry IPC impl has to be copypasta on PGPU and PSocket as well as PContent)
3. Add IPC support (even if this just means asserting on non-commutative operations) to all metric types
   • ( File a bunch of dependent bugs. This is parallelizable )