fix(dea): accumulate all recursion agent text parts

[minzznguyen]

Description

• old implementation was only able to extract the top level of the agent's response
• old implementation only output unnecessary logs when finding iterable objects
• this change provide fix by appending message text instead of returning prematurely, and have helper functions for finding iterable objects

[graceqi-g]

can you attach log of the parsed agent text before and after your change?

also, do the UTs for the generator need to be updated? can you add some around the text parsing if possible?

[IsmailMehdi]

/gcbrun

[minzznguyen]

can you attach log of the parsed agent text before and after your change?

Here is the formatted before and after log - key point to look is that the before section only has messages saying what the agent will do for each turn, while the after section contains messages saying what the agent will do and also message reviewing the code that the agent just generated:

https://docs.google.com/document/d/1WfbFvipzvzBXdex4j8OZHzZwl7eqihq1md4rLKIVL1M/edit?tab=t.jh4qb22b4ubk

[graceqi-g]

can you attach log of the parsed agent text before and after your change?

Here is the formatted before and after log - key point to look is that the before section only has messages saying what the agent will do for each turn, while the after section contains messages saying what the agent will do and also message reviewing the code that the agent just generated:

https://docs.google.com/document/d/1WfbFvipzvzBXdex4j8OZHzZwl7eqihq1md4rLKIVL1M/edit?tab=t.jh4qb22b4ubk

looks good! are you able to add a UT to the generator to ensure the agent text is parsed properly?

[graceqi-g]

/gcbrun