feat(v1.1.2-docs): migrations + shared DocsService trait + TriggerEvent::Docs

Migrations 0013_docs.sql + 0014_docs_triggers.sql land the docs table
(JSONB body + GIN-on-jsonb_path_ops index, PK keyed on (app_id,
collection, id) for cross-app isolation) and widen the triggers.kind
and outbox.source_kind CHECK constraints to include 'docs', plus the
docs_trigger_details detail table mirroring kv_trigger_details.

picloud-shared grows the DocsService trait + DocRow/DocsListPage/
DocsError + NoopDocsService, the TriggerEvent::Docs variant with the
prev_data change-data-capture surface, the DocsEventOp enum, the docs
field on the Services bundle, and the SDK_VERSION bump 1.2 -> 1.3.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/shared/src/services.rs

@@ -18,8 +18,8 @@
 use std::sync::Arc;
 
 use crate::{
-    DeadLetterService, KvService, NoopDeadLetterService, NoopEventEmitter, NoopKvService,
-    ServiceEventEmitter,
+    DeadLetterService, DocsService, KvService, NoopDeadLetterService, NoopDocsService,
+    NoopEventEmitter, NoopKvService, ServiceEventEmitter,
 };
 
 /// SDK service bundle. See module docs for the lifecycle and the v1.1.x
@@ -30,15 +30,20 @@ pub struct Services {
     /// in-memory in tests.
     pub kv: Arc<dyn KvService>,
 
+    /// Document store (v1.1.2). Backed by Postgres in the picloud
+    /// binary; in-memory in tests.
+    pub docs: Arc<dyn DocsService>,
+
     /// Dead-letter management (v1.1.1). Scripts get
     /// `dead_letters::replay(id)` and `dead_letters::resolve(id, reason)`.
     pub dead_letters: Arc<dyn DeadLetterService>,
 
     /// Event emitter for the triggers outbox. Mutating service methods
-    /// (`KvService::set/delete`, future `docs::*`, `files::*`, etc.)
-    /// call `events.emit(cx, event)` after the write succeeds. The
-    /// outbox-backed impl in `manager-core::outbox_event_emitter`
-    /// replaces v1.1.0's `NoopEventEmitter`.
+    /// (`KvService::set/delete`, `DocsService::create/update/delete`,
+    /// future `files::*`, etc.) call `events.emit(cx, event)` after
+    /// the write succeeds. The outbox-backed impl in
+    /// `manager-core::outbox_event_emitter` replaces v1.1.0's
+    /// `NoopEventEmitter`.
     pub events: Arc<dyn ServiceEventEmitter>,
 }
 
@@ -49,11 +54,13 @@ impl Services {
     #[must_use]
     pub fn new(
         kv: Arc<dyn KvService>,
+        docs: Arc<dyn DocsService>,
         dead_letters: Arc<dyn DeadLetterService>,
         events: Arc<dyn ServiceEventEmitter>,
     ) -> Self {
         Self {
             kv,
+            docs,
             dead_letters,
             events,
         }
@@ -68,6 +75,7 @@ impl Services {
     pub fn with_noop_services() -> Self {
         Self::new(
             Arc::new(NoopKvService),
+            Arc::new(NoopDocsService),
             Arc::new(NoopDeadLetterService),
             Arc::new(NoopEventEmitter),
         )