v0.2.0 (1/N): public API surface — interfaces + BridgeOp enum

Establishes the contract layer the rest of v0.2.0 builds on. Pre-1.0
SemVer break: ModelPublisher::publishEntityChange() now takes BridgeOp
instead of a raw string.

Interfaces (Symfony idiom: same namespace as concrete, like HubInterface
next to Hub):
  - PublisherInterface — publish(string, array, bool)
  - ModelPublisherInterface — publishEntityChange(object, BridgeOp)
  - CorrelationContextInterface — set/get/clear

App code should typehint these instead of the concretes so swappable
implementations (offline-buffer publisher, multi-hub fan-out, request-
stamp correlation) remain non-breaking. Concrete classes implement them
unchanged; autowire continues to inject the implementations transparently.

BridgeOp: PHP 8.1 string-backed enum with cases Upsert / Delete /
Replace / Event matching PLAN.md §4's envelope `op` wire format.
Internal call sites updated; tests use the cases directly.

Switched typehints:
  - ModelPublisher ctor: PublisherInterface + CorrelationContextInterface
  - DoctrineBridgeListener ctor: ModelPublisherInterface
  - HealthController ctor: PublisherInterface (still emits `Publisher`
    as bundle canary value — `::class` resolves to the concrete class
    name regardless of typehint, so bundled-supervisor.sh's grep stays
    green)
  - skeleton PingController ctor: PublisherInterface (canonical app
    pattern — example/todo has no Publisher consumer to update)

Drive-by: removed deprecated setAccessible(true) call in
ModelPublisher::extractId — PHP 8.1+ allows reflection without it.

PHPStan + cs-fixer + PHPUnit (17/17) + maker snapshot all pass; dev
container compiles in the example app.

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

CHANGELOG.md

@@ -6,9 +6,21 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 
 ## [Unreleased]
 
+This section tracks work landing on `dev` toward **v0.2.0** (next minor; pre-1.0 SemVer permits API breaks). See PLAN.md §13 for the full v0.2.0 scope.
+
 ### Added
 
-- (none yet — next changes land here)
+- **`PublisherInterface`, `ModelPublisherInterface`, `CorrelationContextInterface`.** The bridge's three public services now ship as interfaces (same namespace as concrete, mirroring upstream `HubInterface`/`Hub`). App controllers and listeners should typehint these instead of the concrete classes so swappable implementations (offline-buffer publisher, request-stamp correlation context, etc.) remain non-breaking. Existing `Publisher` / `ModelPublisher` / `CorrelationContext` classes implement the new interfaces unchanged.
+- **`BridgeOp` enum.** PHP 8.1 string-backed enum (`Upsert` / `Delete` / `Replace` / `Event`) replacing the raw `'upsert'`/`'delete'` strings previously passed between `DoctrineBridgeListener` and `ModelPublisher::publishEntityChange`. Values match PLAN.md §4's envelope `op` wire format. Typo'd ops are now caught at the type level instead of silently producing envelopes clients ignore.
+
+### Changed
+
+- **`ModelPublisher::publishEntityChange()` signature: `string $op` → `BridgeOp $op`.** Pre-1.0 SemVer break. Internal callers updated; external callers (rare) need to migrate from raw strings to enum cases.
+- **Internal typehints switched to interfaces.** `ModelPublisher` constructor takes `PublisherInterface` + `CorrelationContextInterface`; `DoctrineBridgeListener` takes `ModelPublisherInterface`; `HealthController` and the skeleton's `PingController` take `PublisherInterface`. Autowire continues to inject the concrete implementations transparently.
+
+### Fixed
+
+- **`ModelPublisher::extractId` reflection cleanup.** Removed the `setAccessible(true)` call (deprecated since PHP 8.1; all properties are accessible via Reflection without it).
 
 ## [0.1.2] — 2026-05-03