audit: cargo fmt + clippy --fix across workspace + retract_votes cooldown bug fix

Surfaced by Track #38 code audit (2026-05-09):

1. cargo fmt --all: 217 formatting diffs across 35 files. Pure
   whitespace; no semantic changes.

2. cargo clippy --fix: 30 warnings -> 10. Auto-applied:
   - useless format!() (3 sites in builder/proposal_*.rs)
   - needless_borrow_for_generic_args (4 sites)
   - cloned_ref_to_slice_refs (1 site, builder/proposal_cosign.rs)
   - derivable_impls (1 site, dao/config.rs)
   - unused imports/variables (3 sites)

   Remaining 10 warnings are non-trivial (too_many_arguments on a
   constructor at 8 args, FromStr trait shadow, doc_lazy_continuation
   on a few comment blocks). Filed as tech-debt; no action this pass.

3. cargo audit: 0 vulnerabilities. 2 unmaintained advisories on
   transitive deps:
   - paste 1.0.15 (RUSTSEC-2024-0436) via rmcp + pallas-traverse
   - proc-macro-error 1.0.4 (RUSTSEC-2024-0370) via age->i18n-embed-fl
   Both upstream; tracked but no action needed locally.

4. Test failure surfaced: builder::proposal_retract_votes::tests::
   voting_ready_in_window_subtracts_vote_weight failed — cooldown
   check was applied unconditionally for RemoveVoterLockOnly mode,
   blocking the legitimate 'retract during voting window' path
   where the proposal datum mutates (vote weight subtraction). Per
   Agora's premoveLocks rule, cooldown only applies when retracting
   AFTER voting closed but BEFORE Finished — not during the active
   voting window. Fixed by gating cooldown on
   '!proposal_datum_will_change' so the in-window retract path
   bypasses cooldown the same way RemoveAllLocks does.

   Test: 87/87 aldabra-dao lib tests pass post-fix (was 86/87).

Cargo.lock

@@ -97,6 +97,30 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "aldabra-dao"
+version = "0.0.1"
+dependencies = [
+ "aldabra-chain",
+ "aldabra-core",
+ "async-trait",
+ "bech32",
+ "hex",
+ "pallas-addresses",
+ "pallas-codec",
+ "pallas-crypto",
+ "pallas-primitives",
+ "pallas-traverse",
+ "pallas-txbuilder",
+ "reqwest",
+ "serde",
+ "serde_json",
+ "tempfile",
+ "thiserror 1.0.69",
+ "tokio",
+ "tracing",
+]
+
 [[package]]
 name = "aldabra-mcp"
 version = "0.0.1"
@@ -104,7 +128,10 @@ dependencies = [
  "age",
  "aldabra-chain",
  "aldabra-core",
+ "aldabra-dao",
  "anyhow",
+ "hex",
+ "pallas-addresses",
  "rmcp",
  "rpassword",
  "serde",
@@ -482,6 +509,12 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "fastrand"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f1f227452a390804cdb637b74a86990f2a7d7ba4b7d5693aac9b4dd6defd8d6"
+
 [[package]]
 name = "fiat-crypto"
 version = "0.2.9"
@@ -1130,6 +1163,12 @@ version = "0.2.186"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
+
 [[package]]
 name = "litemap"
 version = "0.8.2"
@@ -1800,6 +1839,19 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustix"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
+dependencies = [
+ "bitflags",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "rustls"
 version = "0.23.40"
@@ -2128,6 +2180,19 @@ dependencies = [
  "syn 2.0.117",
 ]
 
+[[package]]
+name = "tempfile"
+version = "3.27.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32497e9a4c7b38532efcdebeef879707aa9f794296a4f0244f6f69e9bc8574bd"
+dependencies = [
+ "fastrand",
+ "getrandom 0.3.4",
+ "once_cell",
+ "rustix",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.69"