Add composite aggregation

[fulmicoton-dd]

Summary

• Rebases Add composite aggregation #5957 by @rdettai-sk onto main with the latest tantivy revision (545169c0d8) which includes composite aggregation support upstream
• Adds composite aggregation types to quickwit-query aggregation mappings
• Fixes Send+Sync constraint in controlled_directory.rs for the updated tantivy API
• Adds REST API test cases for composite aggregations

Test plan

• cargo check passes
• cargo nextest run -p quickwit-query — 139 tests pass
• cargo nextest run -p quickwit-indexing — 165 tests pass
• cargo nextest run -p quickwit-search — 159 tests pass
• CI passes

🤖 Generated with Claude Code

[fulmicoton]

@rdettai-sk Merging your PR in this. Claude made it in a different PR for the rebase. (I hardocded you as the author the author so you get the github stats and street cred.

(git commit --author="Remi Dettai <remi.dettai@sekoia.io>")

[rdettai-sk]

thanks @fulmicoton!

The tests are failing because I have updated tantivy in between to have a safer pagination: just relying on json types is not enough to fully represent all possible page positions inside quickwit fastfield column types. Ideally we should not assert on the pagination key value as it is supposed to be opaque according to the ES spec, but I found it convenient to have a clear test that showcases the behavior here.

[rdettai-sk]

Suggested change

	host: "192.168.0.10"
	name: "Albert"
	response: 100.0
	host: "str:192.168.0.10"
	name: "str:Albert"
	response: "f64:100"

[rdettai-sk]

Suggested change

	host: "192.168.0.10"
	name: "Albert"
	response: 100.0
	host: "str:192.168.0.10"
	name: "str:Albert"
	response: "f64:100"