feat(v1.1.5): pubsub::publish_durable SDK + pubsub:* triggers

Durable pub/sub through the universal outbox — the sixth trigger kind.

- `pubsub::publish_durable(topic, message)` Rhai SDK (no handle; topics
  ARE the grouping unit). Message JSON-encoded; Blobs base64 at any
  depth.
- `PubsubService` trait in picloud-shared with the topic matcher +
  validator (exact / `<prefix>.*` / `*`; mid-pattern wildcards
  rejected). `PostgresPubsubRepo` + `PubsubServiceImpl` in manager-core.
- Publish-time fan-out: one outbox row per matching enabled pubsub
  trigger, all in ONE transaction (no half-fan-out on crash). No
  matching trigger → publish succeeds silently, zero rows.
- `pubsub:*` trigger kind via Layout-E (0020: widen both CHECKs +
  pubsub_trigger_details + partial index), TriggerEvent::Pubsub +
  ctx.event.pubsub, dispatcher arm, admin endpoint POST /triggers/pubsub
  (validates topic pattern + reuses validate_trigger_target).
- AppPubsubPublish capability → script:write (seven-scope held).
- Dashboard Pub/Sub trigger form on the Triggers tab + list rendering.

publish_ephemeral stays deferred to v1.2. ~18 new tests (service
in-memory incl. transactional-rollback, shared matcher, bridge
encoding). No DB required for the suite.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/manager-core/src/lib.rs

@@ -43,6 +43,8 @@ pub mod module_source;
 pub mod outbox_event_emitter;
 pub mod outbox_repo;
 pub mod principal_resolver;
+pub mod pubsub_repo;
+pub mod pubsub_service;
 pub mod repo;
 pub mod route_admin;
 pub mod route_repo;
@@ -113,6 +115,8 @@ pub use outbox_repo::{
     NewOutboxRow, OutboxRepo, OutboxRepoError, OutboxRow, OutboxSourceKind, PostgresOutboxRepo,
 };
 pub use principal_resolver::{AdminPrincipalResolver, PrincipalResolver, PrincipalResolverError};
+pub use pubsub_repo::{PostgresPubsubRepo, PublishCtx, PubsubRepo, PubsubRepoError};
+pub use pubsub_service::PubsubServiceImpl;
 pub use repo::{
     ExecutionLogRepository, NewScript, PostgresExecutionLogRepository, PostgresScriptRepository,
     RepoResolver, ScriptPatch, ScriptRepository, ScriptRepositoryError,
@@ -123,8 +127,8 @@ pub use sandbox::{CeilingError, SandboxCeiling};
 pub use trigger_config::{BackoffShape, TriggerConfig};
 pub use trigger_repo::{
     collection_matches, CreateDeadLetterTrigger, CreateDocsTrigger, CreateFilesTrigger,
-    CreateKvTrigger, DeadLetterTriggerMatch, DocsTriggerMatch, FilesTriggerMatch, KvTriggerMatch,
-    PostgresTriggerRepo, Trigger, TriggerDetails, TriggerDispatchMode, TriggerKind, TriggerRepo,
-    TriggerRepoError,
+    CreateKvTrigger, CreatePubsubTrigger, DeadLetterTriggerMatch, DocsTriggerMatch,
+    FilesTriggerMatch, KvTriggerMatch, PostgresTriggerRepo, Trigger, TriggerDetails,
+    TriggerDispatchMode, TriggerKind, TriggerRepo, TriggerRepoError,
 };
 pub use triggers_api::{triggers_router, TriggersApiError, TriggersState};