models and doc update

doc/endpoints/company_endpoint.puml

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+@startuml Company Company
+Employee -> Company: Join company with provided credentials
+Company ->  Employee: provide a full featured validated peer
+Company -> All: Publishes Employee ContactCard and info
+Company -> Employee: notify publication done, service active
+Employee -> Company: search for contacts
+@enduml 

doc/endpoints/public_endpoint.puml

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+@startuml Public endpoint (free for chat)
+User -> Endpoint: Create & send  invitation for endpoint (Generate User ContactCard and create endpoint pending contact)
+Endpoint -> User: Auto-accept invitation and answer (Generate Endpoint ContactCard and create finalized User contact)
+User -> Endpoint: [auto]validate Answer, invitation finalize (Finalize Endpoint contact and notify Endpoint that communication is possible)
+Endpoint -> User: query mandatory/optional info for profile publication
+User -> Endpoint: provide info
+Endpoint -> All: Publishes User ContactCard and info
+Endpoint -> User: notify publication done, service active
+User -> Endpoint: search for contacts
+@enduml 

doc/invitation/sq_invitation.puml

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+@startuml Server Invitation Step 01
+Bob -> MeowBob: Create invitation for alice (Generate Bob ContactCard and create Alice pending contact)
+Bob -> Alice: Send invitation (Bob ContactCard)
+Alice -> MeowAlice: Accept Invitation and create answer (Generate Alice ContactCard and create finalized Bob contact)
+Alice -> Bob: Send answer (Alice ContactCard)
+Bob -> MeowBob: Review Answer, invitation finalize (Finalize Alice contact and notify Alice that communication is possible)
+@enduml 

doc/messaging/sq_msg01.puml

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+@startuml
+Client1 -> Server: Send Message (PubKeyClient2 +  Payload)
+Server -> Client1: Ack Message (Server UUID +  DateReceived)
+Client1 --> Server: Message delivery ? (PubKeyClient2 +  Payload)
+Server --> Client1: Message delivered (Server UUID +  DateReceived)
+
+Client2 -> Server: Get Messages (PubKeyClient2)
+Server -> Client2: Get Messages [](PubKeyClient2 + Payload)
+Client2 --> Server: Ack Messages Processed
+@enduml 

doc/sq_inv.puml

@@ -1,7 +0,0 @@
-@startuml Server Invitation Step 01
-Bob -> MeowBob: Create invitation for alice
-Bob -> Alice: Send invitation
-Alice -> MeowAlice: Accept Invitation and create answer
-Alice -> Bob: Send answer
-Bob -> MeowBob: Review Answer, invitation finalize
-@enduml 

doc/sq_msg01.puml

@@ -1,8 +0,0 @@
-@startuml
-Client1 -> Server: Send Message (PubKeyClient2 +  Payload)
-Server --> Client1: Ack Message (Server UUID +  DateReceived)
-Client2 -> Server: Get Messages (PubKeyClient2 + IpPublish)
-Server --> Client2: Available Messages list (UUID list cyphered with PubKeyClient2)
-Client2 <- Server: Get Messages (decoded UUID signed with PK)
-Server --> Client2: Messages [](PubKeyClient2 + Payload)
-@enduml