fix(free-time): give the chooser the companion's identity so free time is not always rest

[axAilotl]

Summary

Free time never ran. Live logs from all three companions over 28h show every free-time block ending at the chooser with restReason: companion_rested (plus one chooser_timeout) and turnsUsed: 0.

The free-time chooser is a tool-less background call that decides rest / wander / resume before the block starts. Its system prompt held only the companion's name: no persona, no interests, nothing about what they can do. It also carried a "never manufacture activity" rule, and the menu was just "rest" and "unstructured private time". A model with no identity always picked rest, and rest then silenced the lane for 180 minutes.

Changes

• The chooser gets the companion's identity. A new required resolveIdentityPrompt port is wired to SubstrateAgent.getCurrentAuthoritativeSystemPrompt(), the same canonical identity/policy prompt reflection deliberation already uses. That prompt goes first, and the chooser rules follow under [Free-time choice].
• The prompt no longer tilts toward rest. The "never manufacture activity" line is gone. Rest stays a valid choice "when it is honestly what you want". The wander option now says what free time can be used for: explore, write, read back through memory, keep the journal/wiki/notes, or reach out to a known companion.
• No identity yet → defer_to_block. A companion with no default turn since start has no captured identity prompt. The chooser now skips its model call and lets the block run on the default private session. That turn goes through the ordinary full-persona agent loop, the companion can still end it with the silent reply, and it captures the identity prompt for later chooser calls. No silence is persisted. This covers a companion that has had zero turns since restart (one live companion right now).

Change-budget exception

This is a small, self-contained fix for a live behavior bug: free time is completely non-functional for every companion. Padding or delaying it to reach 800 lines would not help anyone.

Validation

• vitest on free-time-chooser, free-time-chooser-wiring, free-time-lane, and free-time: 83 passed
• eslint on the changed files, tsc --noEmit, verify:hardcoded-settings: pass
• gate:pre-pr via pr:publish

After deploy

• The chooser prompt is now persona-sized. The live chooserDeadlineMs is 8s and one timeout already happened with the tiny prompt. If restReason: chooser_timeout shows up, raise socialAutonomy.freeTimeChooser.chooserDeadlineMs in the live scheduler.json.
• Proof this worked: free-time blocks with turnsUsed > 0, or the Free-time chooser deferred to the block log line.

Bead: psfn-framework-ggki4

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