Add guided AI coaching session for goal creation

[mottych]

Feature Overview

• Add a new coaching session that guides a user through creating a complete goal, including intent, strategies, measures, and actions.
• The session should help the user align the goal with company purpose, values, and vision, then produce the complete goal information after user confirmation.

Problem / Opportunity

• There is currently no dedicated guided coaching flow for defining a goal end-to-end.
• Users need help clarifying goal intent, checking alignment with other goals and company vision, and translating strategy into concrete actions and measures.
• This creates an opportunity to shift insight and alignment earlier in the goal-definition process.

Business Goals

• Improve alignment between new goals and the company purpose, values, and vision.
• Help users create higher-quality goals with clearer strategies, measures, and actions.
• Reduce ambiguity during goal setup by providing structured coaching and feedback throughout the flow.

Target Users

• Users creating a new goal in the system.
• Especially useful for users who need coaching support to define a compelling goal statement, supporting strategies, executable actions, and meaningful measures.

Use Cases

1. Define goal intent and alignment
   • The coach asks questions that help the user define the intent of the goal.
   • The coach evaluates the proposed goal against other goals and the company vision.
   • The coach helps the user shape a compelling statement of intent.
2. Brainstorm strategies
   • The coach helps the user brainstorm strategies to achieve the goal.
   • The coach provides feedback on strategy effectiveness and alignment with purpose, values, vision, and other strategies.
3. Plan actions
   • The coach prompts the user to define the high-level actions needed to execute each strategy.
   • For each action, the user selects the task, due date, assignee, and priority.
   • The coach gives feedback on sequencing, effectiveness, and feasibility within the proposed timeline.
4. Select measures
   • The coach checks whether an existing catalog measure fits the strategy.
   • If needed, the coach suggests defining a custom measure.
   • The coach encourages the user to propose measures and provides feedback on how well they reflect actual strategy progress.
5. Finalize the goal
   • After strategies, actions, and measures are defined, the coach provides an overall assessment and suggests improvements when applicable.
   • Once the user confirms, the system outputs the complete goal information, including goals, strategies, measures, and actions.

Acceptance Criteria

• A user can start a dedicated coaching session for creating a new goal.
• The session guides the user through intent, strategies, actions, and measures in sequence.
• The coach primarily uses thought-provoking questions so the user can generate the ideas where possible.
• The coach only provides suggestions when the user explicitly asks for them or is struggling to produce effective options, and those suggestions require user acceptance.
• The coach has access to business foundation context, including purpose, values, vision, users and roles, existing goals and strategies, and catalog measures.
• The system prompt defines how the coach should drive the conversation, while initiation and resume prompts provide the context needed to start or continue the session.
• After user confirmation, the system returns the complete goal aggregate information for the created goal.

Impacted Areas

• AI coaching experience
• Goal creation / strategic planning flow

[mottych]

Implemented and delivered in PR #324 (merged to dev).\n\nCompletion summary:\n- Added new conversation coaching topic: goals with structured result model GoalCreationResult.\n- Extended runtime OpenAPI topic contracts (x-purposepath-topic-contracts) to include opicType and both single-shot + conversation topic payload schema refs.\n- Added coaching start request examples and topic-specific schema refs for conversation context/result payloads.\n- Updated tests for OpenAPI topic contracts and coaching result models.\n- Updated unified AI integration guide to endpoint-first source of truth and removed duplicated static payload/schema tables.\n- Seeded goals topic + prompts in dev resources during implementation validation.\n- Opened FE follow-up issue in PurposePath_Web: #864 for Goal Overview coaching UX + persistence flow.\n\nValidation run:\n- pytest targeted suites passed\n- ruff checks passed on changed files\n- mypy passed on changed OpenAPI contract scope\n\nDeployment/operations:\n- PR checks passed before merge, including Security Scans.\n- PR #324 merged into dev with merge commit 2de99f1.\n