rename: aldabra → aldabra (per Sulkta 2026-05-04)

Aldabra giant tortoise (Aldabrachelys gigantea) — endemic to the
Aldabra atoll, up to 250 kg, 150-year lifespan. Long-lived,
defended, slow but unstoppable. Better metaphor for the wallet
than 'aldabra' which was on-the-tin descriptive.

All renames in one pass:
- repo: Sulkta-Coop/aldabra → Sulkta-Coop/aldabra (via gitea API)
- workspace dir: aldabra → aldabra
- crate dirs: wallet-{core,chain,mcp} → aldabra-{core,chain,mcp}
- crate names + path imports in Cargo.toml workspace + each crate
- binary name: aldabra → aldabra
- README, ROADMAP, docs/architecture: all references swept

Cargo.toml

@@ -1,9 +1,14 @@
 # Cargo workspace root for aldabra.
 #
 # Three crates:
-#   wallet-core   — key derivation, signing, types, mnemonic handling
-#   wallet-chain  — pluggable chain backends (Koios, Ogmios). Trait-first.
-#   wallet-mcp    — binary; the MCP server, glues core+chain together.
+#   aldabra-core   — key derivation, signing, types, mnemonic handling
+#   aldabra-chain  — pluggable chain backends (Koios, Ogmios). Trait-first.
+#   aldabra-mcp    — binary; the MCP server, glues core+chain together.
+#
+# Named for the Aldabra giant tortoise (Aldabrachelys gigantea) — endemic
+# to the Aldabra atoll in the Seychelles, up to 250 kg, 150-year lifespan.
+# Long-lived, defended, slow but unstoppable. Fitting metaphor for a
+# wallet that holds your money.
 #
 # Workspace deps are pinned here so all three crates use the same versions.
 # Add a dep here, then reference it in each crate's Cargo.toml as
@@ -11,9 +16,9 @@
 [workspace]
 resolver = "2"
 members = [
-    "crates/wallet-core",
-    "crates/wallet-chain",
-    "crates/wallet-mcp",
+    "crates/aldabra-core",
+    "crates/aldabra-chain",
+    "crates/aldabra-mcp",
 ]
 
 [workspace.package]