style: format the whole tree with cargo fmt (stock defaults, #35)

One-time, mechanical reformat — no functional changes. The tree was not
rustfmt-clean (~1800 hunks across ~100 files); this brings it to stock
`cargo fmt` defaults so a `cargo fmt --check` CI gate can follow.
Behaviour-preserving: 2509 pass / 0 fail / 1 ignored (unchanged baseline),
clippy clean. A .git-blame-ignore-revs entry follows so `git blame`
skips this commit.

src/dsl/types.rs

@@ -59,11 +59,7 @@ impl Type {
     #[must_use]
     pub const fn sqlite_strict_type(self) -> &'static str {
         match self {
-            Self::Text
-            | Self::ShortId
-            | Self::Decimal
-            | Self::Date
-            | Self::DateTime => "TEXT",
+            Self::Text | Self::ShortId | Self::Decimal | Self::Date | Self::DateTime => "TEXT",
             Self::Int | Self::Serial | Self::Bool => "INTEGER",
             Self::Real => "REAL",
             Self::Blob => "BLOB",
@@ -107,10 +103,7 @@ impl Type {
     /// match against a numeric column (ADR-0027, Amendment 1).
     #[must_use]
     pub const fn is_numeric(self) -> bool {
-        matches!(
-            self,
-            Self::Int | Self::Real | Self::Decimal | Self::Serial
-        )
+        matches!(self, Self::Int | Self::Real | Self::Decimal | Self::Serial)
     }
 
     /// The user-facing type that an FK column should use to