docs(spec): move the two hand-kept schema counts and four @example keys onto the epoch rename (#15676)

Adding `src/shared/epoch.zod.ts` and its generated reference page moved two
counts that no generator re-derives, and left four JSDoc `@example` blocks
teaching keys this branch turned into tombstones.

The counts (both re-derived by gates, both hand-kept by design):

- `packages/spec/llms.txt` schema-inventory heading 207 -> 208 and the
  `shared` row 13 -> 14. Per that gate's header the number is not the claim,
  the prose beside it is: the row's Key Schemas cell now names the epoch
  instant, so the sentence and the count say the same thing.
- `content/docs/getting-started/quick-reference.mdx` "Shared Protocol"
  (5 of 8) -> (5 of 9). Only M moves: the table is a curated subset by that
  page's own stated rule, so N stays 5 and no row is added.

The examples (no gate reads a JSDoc `@example`, so each was classified in
context by reading the schema it documents):

- `WebSocketEventSchema`'s two examples: `timestamp` -> `occurredAt`.
- `HealthStatusSchema`'s example: `"timestamp"` -> `"checkedAt"`.
- `PluginStartupResultSchema`'s example: the nested `health.timestamp` ->
  `"checkedAt"` — `health` carries `HealthStatusSchema`, so it is the same
  renamed key. Its sibling `"duration"` is untouched.

No key name, describe, meta, schema shape, tombstone, disposition, retired-key
row, conversion or changeset changes.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01G4138K1EG7kQ81FNba5Kp4

Author: claude

content/docs/getting-started/quick-reference.mdx

@@ -206,7 +206,7 @@ from the provider itself, not from hand-written spec files.
 |:---------|:-----------|:------------|:--------|
 | **[Connector](/docs/references/integration/connector)** | `connector.zod.ts` | Connector | The connector protocol — auth, sync, webhooks, rate limiting |
 
-## Shared Protocol (5 of 8 schemas)
+## Shared Protocol (5 of 9 schemas)
 
 Common utilities used across all protocols.
 

packages/spec/llms.txt

@@ -77,7 +77,7 @@ const query = {
 
 ---
 
-## 3. Schema Inventory by Domain (207 schemas)
+## 3. Schema Inventory by Domain (208 schemas)
 
 Counted as `*.zod.ts` modules under `packages/spec/src/<domain>/` — the sources
 that ship in this tarball (`files` includes `src/**/*.zod.ts`), so every number
@@ -91,7 +91,7 @@ here is verifiable from the installed package.
 | api | 30 | Endpoint, REST Server, Discovery, OData, Batch, WebSocket, Response Envelope, Package Lifecycle |
 | ui | 18 | View, App, Action, Dashboard, Page, Chart, Component, Animation |
 | automation | 13 | Flow, Approval, BPMN Interop, Control Flow, State Machine, Webhook |
-| shared | 13 | Enums, HTTP, Identifiers, Mapping, Metadata Types, Connector Auth, Retry Policy, Value Domain |
+| shared | 14 | Enums, HTTP, Identifiers, Mapping, Metadata Types, Connector Auth, Retry Policy, Value Domain, Epoch Instant (EpochMs) |
 | ai | 11 | Agent, Conversation, Knowledge Source/Document, Model Registry, MCP, Skill, Tool |
 | cloud | 11 | Marketplace, Developer Portal, App Store, Environment, Package, Tenant |
 | identity | 5 | Identity, Organization, Position, SCIM, Eval User |

packages/spec/src/api/websocket.zod.ts

@@ -447,7 +447,7 @@ export type WebSocketConfigParsed = z.infer<typeof WebSocketConfigSchema>;
  *   type: 'subscribe',
  *   channel: 'record.account.123',
  *   payload: { events: ['created', 'updated'] },
- *   timestamp: Date.now()
+ *   occurredAt: Date.now()
  * }
  * ```
  * 
@@ -457,7 +457,7 @@ export type WebSocketConfigParsed = z.infer<typeof WebSocketConfigSchema>;
  *   type: 'data-change',
  *   channel: 'record.account.123',
  *   payload: { id: '123', action: 'updated', data: {...} },
- *   timestamp: Date.now()
+ *   occurredAt: Date.now()
  * }
  * ```
  */

packages/spec/src/kernel/startup-orchestrator.zod.ts

@@ -81,7 +81,7 @@ export type StartupOptionsParsed = z.infer<typeof StartupOptionsSchema>;
  * @example
  * {
  *   "healthy": true,
- *   "timestamp": 1706659200000,
+ *   "checkedAt": 1706659200000,
  *   "details": {
  *     "databaseConnected": true,
  *     "memoryUsage": 45.2
@@ -137,7 +137,7 @@ export type HealthStatus = z.input<typeof HealthStatusSchema>;
  *   "duration": 1250,
  *   "health": {
  *     "healthy": true,
- *     "timestamp": 1706659200000
+ *     "checkedAt": 1706659200000
  *   }
  * }
  */