Merge origin/main (Tantivy content search) into delta-sync branch

Both sides added a parameter to create_application_services and a
setup step before it: this branch's storage-usage/quota service (for
the instant-upload path) and main's Tantivy content index (for
SearchService). The resolution keeps both — the signature takes both
arguments and the build runs storage usage as step 3c and the content
index as 3d.

https://claude.ai/code/session_01WdNenpnujNR2sc32XVvwfS

Cargo.toml

@@ -74,6 +74,9 @@ idna = "1.1"
 smol_str = { version = "0.3.2", features = ["serde"] }
 accept-language = "3.1.0"
 askama = "0.16.0"
+tantivy = "0.26.1"
+zip = { version = "8.6.0", default-features = false, features = ["deflate"] }
+pdf-extract = "0.10.0"
 
 [features]
 default = []