fix: align mock mode outputs with actual node output schemas

[FelixNg1022]

Summary

• Update all 9 hardcoded mock outputs in mock-generator.ts to match the real Zod output schemas
• Fixes mismatches for: end, delay, map, filter, http_request, reddit_monitor, twitter_monitor, social_keyword_generator, and draft_emails

Closes #62

Changes

Node	Before (wrong)	After (matches schema)
end	terminated, reason	completed, message
delay	delayed, delayMs	waited, actualDurationMs, message
map	result (array only)	results, count
filter	result, filteredCount	results, count, originalCount
http_request	data	statusText, body, ok, durationMs
reddit_monitor	flat fields	platform, engagement object, proper author fields
twitter_monitor	flat fields	platform, engagement object, proper author fields
social_keyword_generator	keywords, hashtags	topic, twitter, reddit, linkedin, allKeywords
draft_emails	drafts array	emails with full fields, draftedCount

Test plan

• Run jam run end --mock --input '{"message":"done"}' and verify output matches EndOutputSchema
• Run jam run delay --mock --input '{"durationMs":1000}' and verify output matches DelayOutputSchema
• Verify each mock output can be successfully parsed by its corresponding Zod output schema

[Copilot]

Pull request overview

Updates the playground CLI --mock mode outputs to better align with the real node Zod output schemas, addressing schema mismatches reported in #62.

Changes:

• Updated mock outputs for multiple nodes (end, delay, map, filter, http_request, reddit_monitor, twitter_monitor, social_keyword_generator, draft_emails) to match the expected output field names/shape.
• Added additional fields to several mocks (e.g., count, durationMs, engagement objects) to reflect required schema properties.

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[Copilot]

reddit_monitor mock output still doesn't match RedditMonitorOutputSchema (packages/nodes/src/integrations/social/reddit-monitor.ts:74-95). The schema requires top-level totalFound and subredditsSearched, and each post must include upvoteRatio and postedAt (not createdAt). As-is, --mock output will fail schema parsing for this node.

[Copilot]

twitter_monitor mock output is missing required fields from TwitterMonitorOutputSchema (packages/nodes/src/integrations/social/twitter-monitor.ts:96-117): top-level totalFound and hasMore, and per-post postedAt (the mock currently uses createdAt). This will cause schema parsing to fail in mock mode.