Checkpoint the full local bridge and audit work before telemetry removal

You asked for all local code to be committed before the broader telemetry-removal pass. This commit snapshots the current bridge/session ingress changes together with the local audit documents so the next cleanup can proceed from a stable rollback point.

Constraint: Preserve the exact local worktree state before the telemetry-removal refactor begins
Constraint: Avoid mixing this baseline snapshot with the upcoming telemetry deletions
Rejected: Fold these staged changes into the telemetry-removal commit | Would blur the before/after boundary and make rollback harder
Confidence: medium
Scope-risk: moderate
Reversibility: clean
Directive: Treat this commit as the pre-removal checkpoint when reviewing later telemetry cleanup diffs
Tested: Not run (baseline snapshot commit requested before the next cleanup pass)
Not-tested: Runtime, build, and typecheck for the staged bridge/session changes

src/bridge/replBridgeTransport.ts

@@ -3,9 +3,9 @@ import { CCRClient } from '../cli/transports/ccrClient.js'
 import type { HybridTransport } from '../cli/transports/HybridTransport.js'
 import { SSETransport } from '../cli/transports/SSETransport.js'
 import { logForDebugging } from '../utils/debug.js'
-import { errorMessage } from '../utils/errors.js'
 import { updateSessionIngressAuthToken } from '../utils/sessionIngressAuth.js'
 import type { SessionState } from '../utils/sessionState.js'
+import { summarizeBridgeErrorForDebug } from './debugUtils.js'
 import { registerWorker } from './workSecret.js'
 
 /**
@@ -179,7 +179,7 @@ export async function createV2ReplTransport(opts: {
 
   const epoch = opts.epoch ?? (await registerWorker(sessionUrl, ingressToken))
   logForDebugging(
-    `[bridge:repl] CCR v2: worker sessionId=${sessionId} epoch=${epoch}${opts.epoch !== undefined ? ' (from /bridge)' : ' (via registerWorker)'}`,
+    `[bridge:repl] CCR v2: worker registered epoch=${epoch}${opts.epoch !== undefined ? ' (from /bridge)' : ' (via registerWorker)'}`,
   )
 
   // Derive SSE stream URL. Same logic as transportUtils.ts:26-33 but
@@ -217,7 +217,9 @@ export async function createV2ReplTransport(opts: {
         onCloseCb?.(4090)
       } catch (closeErr: unknown) {
         logForDebugging(
-          `[bridge:repl] CCR v2: error during epoch-mismatch cleanup: ${errorMessage(closeErr)}`,
+          `[bridge:repl] CCR v2: error during epoch-mismatch cleanup: ${summarizeBridgeErrorForDebug(
+            closeErr,
+          )}`,
           { level: 'error' },
         )
       }
@@ -347,7 +349,9 @@ export async function createV2ReplTransport(opts: {
         },
         (err: unknown) => {
           logForDebugging(
-            `[bridge:repl] CCR v2 initialize failed: ${errorMessage(err)}`,
+            `[bridge:repl] CCR v2 initialize failed: ${summarizeBridgeErrorForDebug(
+              err,
+            )}`,
             { level: 'error' },
           )
           // Close transport resources and notify replBridge via onClose