Cardano Updates

Bumps [github.com/blinklabs-io/adder](https://github.com/blinklabs-io/adder) from 0.39.1 to 0.41.0.
- [Release notes](https://github.com/blinklabs-io/adder/releases)
- [Commits](https://github.com/blinklabs-io/adder/compare/v0.39.1...v0.41.0)

---
updated-dependencies:
- dependency-name: github.com/blinklabs-io/adder
  dependency-version: 0.41.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

The batteries-included PR (#944) described mithril as "unsupported on
Windows MSVC", but the green `--all-features` Windows CI check shows its
GMP/blst C-crypto crates build and statically link there. Mithril is opt-in
because it's a heavy C toolchain (large binary + long build), not for
portability reasons.

Also fix the kafka note: it now pulls a vendored OpenSSL build (wired to the
`kafka` feature), so opt-in builds need a C compiler + Perl rather than the
platform's system OpenSSL dev libraries. No behaviour change.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

Reduce Oura's dependency footprint so the released binary can bundle most
integrations by default, instead of forcing consumers to compile custom
feature-flavored builds.

Base trims & dedup:
- move reqwest to rustls and bump to 0.12, collapsing the duplicate
  native-tls/openssl and rustls/http/hyper stacks onto a single tree
- gate handlebars behind the `sql` feature (its only user)
- drop the unused `yaml` config format (keep toml + json)
- bump bech32 0.9->0.11 and itertools 0.12->0.14 to dedupe with pallas
- adopt gasket/gasket-prometheus 0.11.1, which drops prometheus_exporter_base
  and its legacy TLS/HTTP server stack (metrics endpoint verified working)

Batteries-included release binary (~37 MB, fully pure-Rust TLS):
- default dist features now bundle u5c, elasticsearch, hydra, redis, rabbitmq,
  sql, gcp and aws
- keep sqlx, elasticsearch and google-cloud-pubsub on rustls so no system
  OpenSSL is pulled into the release build
- leave kafka, zeromq, mithril and wasm opt-in (each needs a special build
  environment incompatible with portable cross-target releases)
- wire the opt-in `kafka` feature to vendored OpenSSL (its only TLS backend is
  openssl-sys) so kafka / `--all-features` builds compile without a system
  OpenSSL; the release bundle stays pure-rustls
- document the bundled vs. source-build integrations in the install docs

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>