ARIA-324 Refactor ctx proxy access
Our previous use of "." to delimit nested dict keys was wrong (keys
could have a ".") and inflexible. The new implementation uses subsequent
args to move into the dict. The same format can now be used to access
object attributes.
This commit also changes how to support setting values: we must now use
"=" as the penultimate argument with the new value following.
Calling functions now requires delimiting function arguments via "[" and
"]" arguments. This makes it possible to continue accessing the return
value of a function after the "]".
Also fixed: callables will now "grab" the number of args they need
instead of all remaining args, making it possible to do further
inspection on the returned value from the callable. To allow for this,
kwargs are now expected as the first arg rather than the last.
Relatedly, this commit instruments all parameter fields from all models
and fixes related bugs in the instrumentation implementation.
Furthmore, this commit fixes a bad null check in the ctx client, and
also allows it to retrieve Unicode data.
17 files changed
