chore(indexer): update iota deps and dedupe the dependency graph (#1215)

* chore(indexer): update iota deps and dedupe the dependency graph

Updating the unpinned `iotaledger/iota` git deps moved them from 0d0f52a to
748d3a8, which pulled in two upstream restructures and split two crates into
duplicate copies.

fastcrypto: iota now takes `fastcrypto` from crates.io (forced by
`iota-sdk-crypto`, a published crate that pins `=0.1.11` from the registry)
while `fastcrypto-tbls` stays on git, where it reaches fastcrypto through an
in-repo path dep. Upstream added a `[patch]` for this, but Cargo only honors
`[patch]` in the root manifest of a build, so it is not inherited by
dependents. Repeat it here.

iota-sdk-types: iota moved its `iota-rust-sdk` pin from e7af68b to 00c80ad
while ours stayed, so the rev mismatch split the source in two. Bump ours to
match.

Two API changes came with the iota bump:

- `iota_types::effects` no longer re-exports `TransactionEffects`; import it
  from `iota_sdk_ext::types` instead. This only type-checks because the
  iota-sdk-types copies were unified above.
- `iota-metrics` switched from `prometheus` to the vendored
  `prometheus-filtered`, so `RegistryService::default_registry()` returns the
  wrapper type. Take a direct dep on `prometheus-filtered` and use its
  `Registry`; the metric types are re-exported from `prometheus` unchanged.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

* fix deny

* update nightly tag

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: DaughterOfMars

.github/workflows/indexer.yml

@@ -20,7 +20,7 @@ jobs:
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
-      - run: cargo +nightly-2026-01-07 fmt --check --manifest-path indexer/Cargo.toml
+      - run: cargo +nightly-2026-08-09 fmt --check --manifest-path indexer/Cargo.toml
 
   udeps:
     name: Check unused dependencies
@@ -30,7 +30,7 @@ jobs:
     steps:
       - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
 
-      - run: cargo +nightly-2026-01-07 udeps --manifest-path indexer/Cargo.toml
+      - run: cargo +nightly-2026-08-09 udeps --manifest-path indexer/Cargo.toml
 
   deny-bans-licenses-sources:
     name: Cargo deny (bans, licenses, sources)