Add LDAP Distinguished Name Helper and Credential Audit Context

- Implemented LdapDistinguishedNameHelper for escaping RDN and filter values.
- Created AuthorityCredentialAuditContext and IAuthorityCredentialAuditContextAccessor for managing credential audit context.
- Developed StandardCredentialAuditLogger with tests for success, failure, and lockout events.
- Introduced AuthorityAuditSink for persisting audit records with structured logging.
- Added CryptoPro related classes for certificate resolution and signing operations.

src/Notify/__Libraries/StellaOps.Notify.Connectors.Email/TASKS.md

@@ -1,2 +0,0 @@
-# Notify Email Connector Task Board (Sprint 15)
-> Archived 2025-10-26 — connector maintained under `src/Notifier/StellaOps.Notifier` (Sprints 38–40).

src/Notify/__Libraries/StellaOps.Notify.Connectors.Slack/TASKS.md

@@ -1,2 +0,0 @@
-# Notify Slack Connector Task Board (Sprint 15)
-> Archived 2025-10-26 — connector scope now in `src/Notifier/StellaOps.Notifier` (Sprints 38–40).

src/Notify/__Libraries/StellaOps.Notify.Connectors.Teams/TASKS.md

@@ -1,4 +0,0 @@
-# Notify Teams Connector Task Board (Sprint 15)
-> Archived 2025-10-26 — connector work now owned by `src/Notifier/StellaOps.Notifier` (Sprints 38–40).
-
-> Remark (2025-10-20): Teams test-send now emits Adaptive Card 1.5 payloads with legacy fallback text (`teams.fallbackText` metadata) and hashed webhook secret refs; coverage lives in `StellaOps.Notify.Connectors.Teams.Tests`. `/channels/{id}/health` shares the same metadata builder via `TeamsChannelHealthProvider`, ensuring webhook hashes and sensitive keys stay redacted.

src/Notify/__Libraries/StellaOps.Notify.Connectors.Webhook/TASKS.md

@@ -1,2 +0,0 @@
-# Notify Webhook Connector Task Board (Sprint 15)
-> Archived 2025-10-26 — webhook connector maintained in `src/Notifier/StellaOps.Notifier` (Sprints 38–40).

src/Notify/__Libraries/StellaOps.Notify.Engine/TASKS.md

@@ -1,2 +0,0 @@
-# Notify Engine Task Board (Sprint 15)
-> Archived 2025-10-26 — runtime responsibilities moved to `src/Notifier/StellaOps.Notifier` (Sprints 38–40).

src/Notify/__Libraries/StellaOps.Notify.Models/TASKS.md

@@ -1,2 +0,0 @@
-# Notify Models Task Board (Sprint 15)
-> Archived 2025-10-26 — scope moved to `src/Notifier/StellaOps.Notifier` (Sprints 38–40).

src/Notify/__Libraries/StellaOps.Notify.Queue/TASKS.md

@@ -1,2 +0,0 @@
-# Notify Queue Task Board (Sprint 15)
-> Archived 2025-10-26 — queue infrastructure maintained in `src/Notifier/StellaOps.Notifier` (Sprints 38–40).

src/Notify/__Libraries/StellaOps.Notify.Storage.Mongo/TASKS.md

@@ -1,2 +0,0 @@
-# Notify Storage Task Board (Sprint 15)
-> Archived 2025-10-26 — storage responsibilities now tracked in `src/Notifier/StellaOps.Notifier` (Sprints 38–40).