Bulk v4 batch routes + strongly-typed -Secrets IDictionary[string,string][]

- Endpoint registry: register POST/PATCH/DELETE /api/v4/secrets/batch as preferred candidates for BulkCreate/Update/Delete; v3 raw routes retained as automatic fallback.
- DTOs: add projectId (required for v4) alongside workspaceId on the three batch request envelopes; both serialized when set, both ignored when null.
- SecretsClient: populate ProjectId in CreateBatch/UpdateBatch/DeleteBatch so v4 succeeds on first attempt.
- Cmdlets: -Secrets on New/Update-InfisicalSecret changed from Hashtable[] to IDictionary<string,string>[] for stronger typing and tab-completion; converter rewritten to accept IEnumerable<IDictionary<string,string>>. TagIds parsed from comma-separated string; nested Metadata dropped from bulk hashtable surface (still settable programmatically on bulk items).
- Tests: 166 passing (was 161). Bulk endpoints now resolve to v4 primary with v3 fallback; new tests verify projectId envelope serialization, dual-key omission, and TagIds trimming.

Module/PSInfisicalAPI/PSInfisicalAPI.psd1

@@ -1,6 +1,6 @@
 @{
     RootModule           = 'PSInfisicalAPI.psm1'
-    ModuleVersion        = '2026.06.03.2207'
+    ModuleVersion        = '2026.06.04.0005'
     GUID                 = 'b8a2f3d4-7c51-4d2f-9e6a-1f0c8b3d4e51'
     Author               = 'Grace Solutions'
     CompanyName          = 'Grace Solutions'
@@ -51,7 +51,7 @@
             LicenseUri   = 'https://www.gnu.org/licenses/agpl-3.0.html'
             ProjectUri   = 'https://prod.git.gracesolution.info/gsadmin/PSInfisicalAPI'
             ReleaseNotes = 'See CHANGELOG.md in the project repository for release history.'
-            CommitHash   = '09c3d5c68bbc'
+            CommitHash   = 'e0a6ef02df3e'
         }
     }
 }