feat: add lightweight trigger service

[jairad26]

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• Bug fix
• New feature
• Refactor / code improvement
• Documentation

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[jairad26]

• feat: clarify remote fork targets #33
• feat: record trigger execution state #32
• feat: browse remote child sessions #31
• feat: add trigger webhook secrets #30
• feat: add TUI remote session picker #29
• feat: persist trigger state #28
• feat: pick remote continue sessions #27
• feat: add trigger fire webhook endpoint #26
• feat: confirm remote continue targets #25
• feat: add manual trigger fire #24
• feat: validate remote session targets #23
• feat: add trigger lifecycle controls #22
• feat: execute trigger command actions #21
• feat: add remote attach preflight #20
• feat: add lightweight trigger service #19 👈 (View in Graphite)
• dev

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[jairad26]

Merge activity

• Apr 1, 2:45 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Apr 1, 2:45 AM UTC: @jairad26 merged this pull request with Graphite.