Feat v0.7.11 query http ergonomics (#65)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

CHANGELOG.md

@@ -2,6 +2,25 @@
 
 All notable changes to Armature are documented here.
 
+## v0.7.11 — Query & HTTP Ergonomics
+
+Four new Starlark sandbox builtins. No new permissions, no schema changes.
+
+**db module (permission: `db.read`)**
+
+- `db.count(table, filters={})` — returns integer count of matching rows.
+- `db.aggregate(table, column, op, filters={})` — single-value aggregation. `op` ∈ {count, sum, avg, min, max}. Returns int, float, or None.
+- `db.query_batch(queries)` — execute up to 10 query specs in a single call. Each spec supports the same parameters as `db.query`.
+
+**http module (permission: `api.http`)**
+
+- `http.batch(requests)` — concurrent HTTP dispatch of up to 10 requests. Individual failures return error response dicts (`status: 0`) rather than aborting the batch.
+
+**Internal**
+
+- Extracted `buildSelectQuery` helper from `dbQuery` for reuse by `db.query_batch`.
+- 21 new tests (14 db, 7 http).
+
 ## v0.7.10 — Workflow Handoff + Assignment UI
 
 Closes the three UX gaps found during v0.7.9: public→team handoff,