fix(jira): resolve missing stories status, storiesListId, and progress model context

[zbigniewsobiecki]

Summary

Fixes three bugs observed when running the splitting agent on JIRA projects:

• Missing "stories" status in JIRA wizard — JIRA_STATUS_SLOTS omitted stories, so users couldn't configure which JIRA status corresponds to the stories stage. Added it after splitting to match TRELLO_LIST_SLOTS.
• storiesListId always undefined for JIRA — promptContext.ts only read from getTrelloConfig(). For JIRA projects the splitting prompt rendered STORIES_LIST_ID: NOT_CONFIGURED, causing the agent to hallucinate a container ID and loop. Now falls back to the JIRA project key (e.g. BTS), which is what CreateWorkItem's containerId needs.
• Progress model thinks "splitting" means splitting code files — The progress system prompt was agent-agnostic. Added Agent role: hints (extracted to shared AGENT_ROLE_HINTS in agentMessages.ts) so the progress model generates contextually correct messages.

Additionally:

• New JIRA issues are now auto-transitioned to the stories status after creation (mirrors Trello's behavior of placing cards directly in the stories list)
• AGENT_ROLE_HINTS extracted from ackMessageGenerator.ts to shared agentMessages.ts, used by both ack and progress models

Files changed

File	Change
src/config/agentMessages.ts	Add exported AGENT_ROLE_HINTS map
src/router/ackMessageGenerator.ts	Import shared AGENT_ROLE_HINTS instead of local const
src/backends/progressModel.ts	Add Agent role: line to progress prompt
src/agents/shared/promptContext.ts	Fall back to JIRA project key for storiesListId
src/pm/jira/adapter.ts	Auto-transition new issues to stories status
web/src/components/projects/pm-wizard.tsx	Add stories to JIRA_STATUS_SLOTS

Test plan

• Added test: JIRA storiesListId resolves to project key
• Added test: progress model includes agent role hint in prompt
• Added test: progress model uses fallback hint for unknown agent types
• Added test: JIRA adapter transitions new issues to stories status
• Added test: no transition when stories status not configured
• Added test: graceful handling when stories transition fails
• Updated ack generator mock to include AGENT_ROLE_HINTS
• All 3232 tests pass, lint clean, typecheck clean

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