chore: consolidate documentation — delete status/fix/progress cruft

Before: 335 tracked .md files; top level had 14 README-like docs;
docs/ contained ~234 files, most of them auto/LLM-generated status
reports (ALL_*_COMPLETE*, *_FIX*, DEPLOYMENT_*_FINAL*, etc.).

After: 132 tracked .md files. Repo now has exactly five top-level
docs: README.md, QUICKSTART.md, RUNBOOK.md, CONTRIBUTING.md,
CHANGELOG.md (moved up from docs/).

Keeper philosophy in docs/:
- API, CCIP (ops + security + receiver/router refs), Chainlist refs,
  compliance, deployment (guides not status), database connection,
  legal compliance, metamask integration, production checklist,
  tiered-architecture implementation/setup, reusable-components plan,
  token-mechanism doc, wrap-and-bridge operational reference, plus
  docs/specs/** and docs/api/ / docs/openapi/ trees.

Deleted (git history preserves provenance):
- All 'ALL_*_COMPLETE*' / '*_FIX*' / '*_FIXED*' / '*_FINAL*' /
  '*_STATUS*' / '*_PROGRESS*' / '*_SUMMARY*' files.
- BLOCKSCOUT_*_FIX / _CRASH / _INITIALIZATION / _SCHEMA / _YAML /
  _SKIP / _NEXT_STEPS / _START_AND_BUILD / _DATABASE_CREDENTIALS
  (the last contained passwords).
- CCIP_IMPLEMENTATION_* / CCIP_CURRENT_STATUS / CCIP_GAP_*
  (gap analyses are not a sustained reference).
- NPMPLUS_CREDENTIALS_GUIDE.md (contained creds).
- LETSENCRYPT_CONFIGURATION_GUIDE.md (contained creds; will be
  re-introduced as runbook content post-secrets-scrub).
- docs/diagnostic-reports/, docs/feature-flags/ (run-time artifacts).

README.md: dead links (START_HERE, README_DEPLOYMENT, COMPLETE_DEPLOYMENT,
DEPLOYMENT_COMPLETE_FINAL) replaced with links to the five canonical
top-level docs + docs/ index.

docs/BLOCKSCOUT_YAML_FIX.md

@@ -1,95 +0,0 @@
-# Fix YAML Quote Issues in docker-compose.yml
-
-## Problem
-Docker Compose is failing with "No closing quotation" error because the command string has nested quotes that aren't properly escaped.
-
-## Solution: Use YAML List Format
-
-Instead of:
-```yaml
-command: sh -c "bin/blockscout eval \"Explorer.Release.migrate()\" && bin/blockscout start"
-```
-
-Use YAML list format:
-```yaml
-command:
-  - sh
-  - -c
-  - "bin/blockscout eval \"Explorer.Release.migrate()\" && bin/blockscout start"
-```
-
-## Commands to Fix
-
-```bash
-cd /opt/blockscout
-
-# Backup
-cp docker-compose.yml docker-compose.yml.backup3
-
-# Fix using Python
-python3 << 'PYTHON'
-import re
-
-with open('docker-compose.yml', 'r') as f:
-    lines = f.readlines()
-
-new_lines = []
-i = 0
-while i < len(lines):
-    line = lines[i]
-    # Check if this is a command line with blockscout start
-    if 'command:' in line and ('blockscout start' in line or '/app/bin/blockscout start' in line):
-        # Replace with YAML list format
-        indent = len(line) - len(line.lstrip())
-        new_lines.append(' ' * indent + 'command:\n')
-        new_lines.append(' ' * (indent + 2) + '- sh\n')
-        new_lines.append(' ' * (indent + 2) + '- -c\n')
-        new_lines.append(' ' * (indent + 2) + '- "bin/blockscout eval \\"Explorer.Release.migrate()\\" && bin/blockscout start"\n')
-        i += 1
-        # Skip continuation lines if any
-        while i < len(lines) and (lines[i].strip().startswith('-') or lines[i].strip() == ''):
-            i += 1
-        continue
-    new_lines.append(line)
-    i += 1
-
-with open('docker-compose.yml', 'w') as f:
-    f.writelines(new_lines)
-
-print("✅ Updated docker-compose.yml")
-PYTHON
-
-# Verify
-grep -A 4 "command:" docker-compose.yml
-
-# Start
-docker-compose up -d blockscout
-```
-
-## Alternative: Manual Edit
-
-If Python doesn't work, edit manually:
-
-```bash
-cd /opt/blockscout
-nano docker-compose.yml
-```
-
-Find:
-```yaml
-    command: /app/bin/blockscout start
-```
-
-Replace with:
-```yaml
-    command:
-      - sh
-      - -c
-      - "bin/blockscout eval \"Explorer.Release.migrate()\" && bin/blockscout start"
-```
-
-Save and exit, then:
-```bash
-docker-compose up -d blockscout
-```
-