chore(session-ingest): bump direct ingest percent to 100

[pandemicsyn]

Summary

Bump the session-ingest DIRECT_INGEST_PERCENT var from 75 to 100 in services/session-ingest/wrangler.jsonc, completing the rollout of the direct-ingest path to all non-allowlisted users.

Verification

• Confirm production traffic mix after deploy via the direct_ingest_legacy / direct_ingest_ok log events — direct_ingest_legacy should drop to ~0 except for oversize / error fallbacks.
• Confirm no spike in direct_ingest_error, direct_ingest_fallback, or direct_ingest_attention_error events.

Visual Changes

N/A — runtime config change only.

Reviewer Notes

• Single-line var change in services/session-ingest/wrangler.jsonc; no code, schema, or test changes.
• Follow-up to chore(session-ingest): bump direct ingest percent to 50 #4560 (20% → 50%) and chore(session-ingest): bump direct ingest percent to 75 #4567 (50% → 75%). The allowlist in DIRECT_INGEST_USER_IDS remains in effect but is now redundant with 100% rollout — consider removing it in a follow-up cleanup.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Single-line config change bumping DIRECT_INGEST_PERCENT from 75 to 100 in services/session-ingest/wrangler.jsonc; the value is within the validated/tested range and no code was changed.

Files Reviewed (1 files)

• services/session-ingest/wrangler.jsonc

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_{Review guidance: REVIEW.md from base branch main}