ocs_doc_api: Phase 2b-a (Text/MText annotations)

- CreateText/CreateMText/SetTextContent ops + GetTextContent query (append-only).
- backend add_text/add_mtext/set_text_content/text_content (Text.value/MText.value).
- facade create_text/create_mtext + Text/MText handles with content()/set_content().
- Text/MText coarse bounds + transform (insertion point); ensure_transformable.
- spec Text/MText families; api_reference + binding_schema regenerated; mocks.
- can_modify backend hook (exists + not-locked) for SetTextContent validation.
- consistency baseline extended with the appended variants.
- Test phase2b_text_mtext_create_content_transform -> 605 host lib + 3 consistency green.

crates/ocs_doc_api/spec/entities.toml

@@ -237,6 +237,59 @@ args = [{ name = "origin", ty = "[f64; 3]" }, { name = "direction", ty = "[f64;
 op = "CreateCurve"
 fixed = { curve = "XLine" }
 
+# ============================================================================
+# ANNOTATION FAMILY (phase 2b) — text annotations
+# ============================================================================
+[[family]]
+name = "Text"
+acadrust_variant = "Text"
+handle = "Text"
+collection = "curves"
+description = "Single-line text annotation. content()/set_content() read+replace the value; transform moves insertion point."
+
+[[family.constructor]]
+name = "create_text"
+args = [{ name = "value", ty = "&str" }, { name = "insertion_point", ty = "[f64; 3]" }, { name = "height", ty = "f64" }, { name = "rotation", ty = "f64" }]
+op = "CreateText"
+
+[[family.method]]
+name = "content"
+kind = "query"
+query = "GetTextContent"
+returns = "String"
+
+[[family.method]]
+name = "set_content"
+kind = "op"
+op = "SetTextContent"
+args = [{ name = "value", ty = "&str" }]
+returns = "()"
+
+[[family]]
+name = "MText"
+acadrust_variant = "MText"
+handle = "MText"
+collection = "curves"
+description = "Multi-line text annotation. content()/set_content() read+replace the value; transform moves insertion point."
+
+[[family.constructor]]
+name = "create_mtext"
+args = [{ name = "value", ty = "&str" }, { name = "insertion_point", ty = "[f64; 3]" }, { name = "height", ty = "f64" }]
+op = "CreateMText"
+
+[[family.method]]
+name = "content"
+kind = "query"
+query = "GetTextContent"
+returns = "String"
+
+[[family.method]]
+name = "set_content"
+kind = "op"
+op = "SetTextContent"
+args = [{ name = "value", ty = "&str" }]
+returns = "()"
+
 # ============================================================================
 # CONTAINER FAMILY (phase 3) — block references
 # ============================================================================