v2.0-beta.gp.28: Release 2.0-beta.gp.28

Changes:

• GP-39157 Add circuit breaker in dispatcher
• GP-38725 Implement retry with exponential backoff for SFTP upload

2.0-beta.gp.27

Changes:

• GP-37449 Add "Return Value" action

2.0-beta.gp.25

Changes:

• GP-36357 Fix logging schema after table creation

2.0-beta.gp.21

Changes:

• GP-22489 Add APIv4 Action
• GP-29383 Split "Save" into "Save" and "Save and Done"

2.0-beta.gp.19

Changes:

• GP-25284 Fix invalid reply-to header when default inbox missing

2.0-beta.gp.18

Changes:

• GP-25002 Fix constraint error for duplicate entities in tag sync

2.0-beta.gp.17

Changes:

• GP-24803 Optimize tag sync queries
• GP-20182 Remove hard dependency on CiviRules

2.0-beta.gp.16

Changes:

• GP-20182 Check class existence just before function call

2.0-beta.gp.15

Changes:

• GP-20182 Fix compatibility with recent CiviRules

2.0-beta.gp.14

Changes:

• GP-21599 Fix ambiguous campaign_id column in CreateActivity action