feat(research,registry,cli): campaign data.bindings — the 6b rebind seam (#231 task 5)

DataSection gains an additive bindings block (role -> column; serde
default + skip-if-empty, so binding-less documents keep their content
ids — pinned). Validation is two-tier along the existing line: the
intrinsic tier checks binding VALUES against the column vocabulary
(DocFault::UnknownBindingColumn, alias-annotated display register); the
resolver tier checks binding KEYS against the loaded strategies'
input_roles() (RefFault::BindingRoleUnknown — a key must name a role of
at least one campaign strategy). A cross-surface pin keeps the doc-tier
vocabulary and the CLI binding module from drifting.

CliMemberRunner threads the campaign overrides into resolve_binding on
BOTH halves (column opening and wrap), keeping the C1 drift alarm
comparing like-with-like; the verb sugar passes no bindings (name
defaults rule).

Proof: an archive-gated campaign e2e rebinds price -> open and yields
different realized metrics from the close-bound run; refusal prose
exact-pinned at both tiers.

Verified: full workspace suite green, clippy -D warnings clean;
independent quality review, all findings repaired.

refs #231

crates/aura-campaign/src/lib.rs

@@ -475,6 +475,7 @@ mod tests {
             data: DataSection {
                 instruments: vec!["EURUSD".to_string()],
                 windows: vec![Window { from_ms: 0, to_ms: 10_000 }],
+                bindings: BTreeMap::new(),
             },
             risk: vec![],
             strategies: vec![StrategyEntry {
@@ -901,6 +902,7 @@ mod wf_tests {
             data: DataSection {
                 instruments: vec!["SYNTH".to_string()],
                 windows: vec![Window { from_ms: window.0, to_ms: window.1 }],
+                bindings: BTreeMap::new(),
             },
             risk: vec![],
             strategies: vec![StrategyEntry {

crates/aura-campaign/tests/execute.rs

@@ -149,6 +149,7 @@ fn campaign(instruments: &[&str]) -> CampaignDoc {
         data: DataSection {
             instruments: instruments.iter().map(|s| s.to_string()).collect(),
             windows: vec![Window { from_ms: 1_000, to_ms: 9_000 }],
+            bindings: BTreeMap::new(),
         },
         risk: vec![],
         strategies: vec![StrategyEntry {